April 16, 2025 | Jillian Kent

Facts About M*A*S*H


It’s A Classic For A Reason

M*A*S*H first aired on September 17, 1972. Its last episode aired 11 years later, in February 1983. Despite being off the air for over four decades, M*A*S*H continues to be popular with fans young and old. Here are some facts that even the most veteran fans likely didn’t know.

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The Actors Knew What They Were Doing

Believe it or not, it’s true! Alan Alda, Jamie Farr, Wayne Rogers, and Mike Farrell all served at some point before appearing on M*A*S*H. Their own experiences surely played into their roles throughout the show.

Mash Cast 1977CBS Television, Wikimedia Commons

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The Actors Knew What They Were Doing

Alda was part of the Army Reserve in Korea. Farr was stationed in Japan when his service was requested during a USO Tour through Korea. Rogers spent some time as a ship navigator with the Navy, and Farrell spent time with the US Marine Corps.

Mash Tv Cast 1974CBS Television, Wikimedia Commons

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What Does MASH Stand For?

Okay, if you are a true fan of the show, then you should already know this fact. However, just in case you’ve forgotten, we’ll give it to you again. “MASH” stands for Mobile Army Surgical Hospital. It was used in Korea and was, of course, the setting for M*A*S*H.

8225Th Mash Personnel With H-13 Helo In Korea 1951U.S. Signal Corps, Wikimedia Commons

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The Cast Was Almost Much Different

Mclean Stevenson, who went on to play Lt Colonel Henry Blake, did not initially audition for that role. He came out for Hawkeye, which went to Alda. But there’s more!

Mclean Stevenson Henry Blake Mash 1972CBS Television, Wikimedia Commons

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The Cast Was Almost Much Different

Wayne Rogers made his mark as Trapper John. However, the role was not intended for him. Robert Klien, a comedian, was offered the role first but turned it down. He certainly lived to regret that decision.

Wayne Rogers Trapper John Mash 1972CBS Television, Wikimedia Commons

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The Movie Came First

Before M*A*S*H aired on television in 1972, the same characters graced the big screen first. The film, directed by Robert Altman, was released in 1970. It was met with such great success that the world wanted more.

Screenshot from the movie M*A*S*H (1970)Aspen Productions, M*A*S*H (1970)

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The Movie Came First

Both the film and television show are based on the same novel: MASH: A Novel About Three Army Doctors. An attempt to turn the book’s sequel into a film never took off the ground. The idea of a television spin-off, however, did.

M A S H (1970 Film Poster)20th Century Fox., Wikimedia Commons

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Film VS Television

Although M*A*S*H is often marketed as a spin-off of the film, and it does primarily feature the same characters, there are some key differences. The biggest difference, of course, is the cast. Nearly every character was replaced.

Screenshot from the TV show M*A*S*H (1972-1983)Twentieth Century, M*A*S*H (1972-1983)

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Film VS Television

The late Donald Southerland starred in M*A*S*H (1970) as Hawkeye Pierce, and Elliot Gould played his counterpart, Trapper John. While almost all actors were replaced between the film and the show, there was one character that remained the same.

Film director Donald SutherlandFestival TV Monte-Carlo, CC BY-SA 3.0, Wikimedia Commons

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Radar O’Reilly

M*A*S*H may have recast most of their major characters. However, one actor remained in his role. Gary Burghoff played Radar O’Reilly in both the film and the television show. This made him the one constant between the two works.

Gary Burghoff Radar Mash 1974CBS Television, Wikimedia Commons

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The Pilot Was Written In Record Time

You would think that it would take months, if not years, to properly write a pilot for a show as successful as M*A*S*H. You’d be wrong. Larry Gelbart, a screenwriting ace who’d been living in London, wrote the pilot in just two days.

David Ogden Stiers Gary Burghoff Mash 1977CBS Television, Wikimedia Commons

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It Almost Didn’t Make It

Maybe it was because it was thrown together so quickly. However, M*A*S*H struggled to find an audience early on. Its first season was ranked 46. There was a lot of doubt about whether this fledgling show would be allowed to fly.

Gary Burghoff And Mclean Stevenson - Mash 1972CBS Television, Wikimedia Commons

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The Network Saved It

Despite its poor ratings, and the doubts that people had about its ability to survive, CBS decided to take a chance and renew it for its second season. However, they made a key change that made all of the difference.

Screenshot from the TV show M*A*S*H (1972-1983)Twentieth Century, M*A*S*H (1972-1983)

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The Saturday Line Up

CBS moved M*A*S*H to their Saturday night lineup, sandwiching it between All In The Family and The Marry Tyler Moore Show. It was just what the show needed to boost its ratings.

Screenshot from the TV show M*A*S*H (1972-1983)Twentieth Century, M*A*S*H (1972-1983)

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Season 2 Soared

M*A*S*H made an astounding recovery in its second season. It went from ranking 46 after the end of its first season to jumping into the top 10 for its second season. Although it would move broadcast days for its later seasons, it never placed lower than the top 20 in ratings.

Screenshot from the TV show M*A*S*H (1972-1983)Twentieth Century, M*A*S*H (1972-1983)

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Klinger Found A Way To “Kling” On

Originally, Jamie Farr’s character of Maxwell Q Klinger (known as Klinger) was only supposed to appear in a single episode. However, he proved to be a crowd favorite and continued to stay on. That wasn’t all that changed about Klinger.

Stumpers Mike Farrell Allen Ludden Jamie Farr 1976NBC, Wikimedia Commons

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The Origins Of Klinger

Klinger became famous for his antics of “cross-dressing” to try to get discharged from Korea. It is rumored that Klinger was originally supposed to be gay, but they decided to change his character to what he became: a straight man pretending. It was also rumored to be based on real life.

Jamie Farr-The Chicago Teddy Bears-Cbs (1971 Black & White Photograph)CBS Network Television, Wikimedia Commons

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The Origins Of Klinger

The story goes that the backstory for Klinger was sourced from comedian Lenny Bruce. Bruce claimed that he was discharged from the Navy for expressing “homosexual tendencies”. It certainly bears a resemblance to Klinger’s tale.

Alan Alda Jamie Farr Hawkeye And Klinger Mash 1977CBS Television, Wikimedia Commons

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Dr Hornburger

The novel that both the film and the series were based on was written by Dr Richard Hornberger under a penname. Essentially, they were based on his own experiences in Korea—and he had strong opinions about both adaptations.

Screenshot from the TV show M*A*S*H (1972-1983)Twentieth Century, M*A*S*H (1972-1983)

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Dr Hornburger

Hornburger enjoyed the movie. However, he did not like the television show. Hornburger identified as a conservative, and he felt that Alan Alda’s portrayal of Hawkeye gave the character a tendency towards liberal views he did not like. Alda had a different opinion of the character.

Screenshot from the TV show M*A*S*H (1972-1983)Twentieth Century, M*A*S*H (1972-1983)

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Alan Alda Saw Hawkeye As Conservative

Many people have stated that Hawkeye came across as “liberal” in nature. However, Alda never saw the character as a “true liberal”. He felt that Hawkeye, in many of his beliefs, was still a traditional conservative.

Alan Alda Hawkeye MashCBS Television, Wikimedia Commons

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No One Wanted The Laugh Track

If you watch M*A*S*H, particularly in the early seasons, you will hear the very familiar “laugh track” that so many of the shows from that period had. The show's creator, Larry Gelbart, and the executive producer, Gene Reynolds, didn’t want it. CBS wouldn’t budge.

Wayne Rogers Alan Alda Mash 1972CBS Television, Wikimedia Commons

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No One Wanted The Laugh Track

The problem was that CBS didn’t know how to produce a “comedy” that didn’t have a laugh track. As the season goes on, viewers will notice that it gets dimmer and dimmer. If you watched M*A*S*H in the UK you were spared entirely as BBC chose to leave it out.

Prince Charles And Alan Alda Mash Set 1977CBS Television, Wikimedia Commons

A Child Wrote The Theme Song

The theme for M*A*S*H was originally written for the 1970 movie. It is credited to Johnny Mandel and Michael Altman—the film director’s 15-year-old son. They had a goal that only Altman’s son could reach.

Gary Burghoff Alan Alda Loretta Swit Mash 1976CBS Television, Wikimedia Commons

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A Child Wrote The Theme Song

They wanted the song to be “the stupidest song ever written”. Mandel and Altman just couldn’t quite get what they were looking for. So, Altman had his son, Michael, take a run at the lyrics. The success that he made for the song is mind-blowing.

Cast Of Mash, 1973Harry Chase, CC BY 4.0, Wikimedia Commons

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A Child Wrote The Theme Song

Supposedly Altman earned $70,000 for directing the movie. According to him, his son made more than $1 million just for writing that song. Not bad for 15 years old.

Loretta Swit Hot Lips Mash 1972CBS Television, Wikimedia Commons

CBS Vetoed Some Ideas

Initially, they pitched a theme for an episode in which the men stood outside in the cold to make themselves sick enough to be sent home. The idea was reportedly a tactic used by men in Korea. However, CBS felt it was “unpatriotic” and refused to approve it.

Alan Alda Loretta Swit Mash 1977CBS Television, Wikimedia Commons

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Who Appeared In The Most Episodes?

There are many great and memorable characters in M*A*S*H. However, there is only one character that appears in every single episode: Alan Alda’s Hawkeye Pierce.

Alan Alda Robert Alda Mash 1975CBS Television, Wikimedia Commons

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The Writers Didn’t Mess Around

In the early days, the cast members constantly had “notes” about their scripts. It didn’t last long. Twice, in response to notes, the writers changed the script so that the actors were forced to dress in heavy parkas despite it being nearly 100 degrees Fahrenheit on set. The notes stopped after that.

Alan Alda Clete Roberts Mash 1976CBS Television, Wikimedia Commons

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Wayne Rogers Walked Away

Despite being one of the central characters, Wayne Rogers left M*A*S*H after the end of the third season. He felt that his character, Trapper John, was constantly overshadowed by Hawkeye, and he was tired of it. Though, how was he able to walk away when he had a contract?

Alan Alda Wayne Rogers Mash 1972CBS Television, Wikimedia Commons

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Wayne Rogers Never Signed

The truth was that Rogers never signed the contract that they had given him. Therefore, when he chose to leave, there was no contract for him to breach. He claims he never regretted his choice to leave. He only missed the friendships he’d made with the cast.

Wayne Rogers City Of Angels 1976NBC Television, Wikimedia Commons

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Who Knew About Henry Blake?

There was another big cast change at the end of season three. McLean Stevenson, who played Lt Col. Henry Blake, also wanted to depart from the show after the third season wrapped. The writers saw an opportunity with this change and took it.

Mash Tv Cast 1972CBS Television, Wikimedia Commons

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Who Knew About Henry Blake?

If you haven’t watched M*A*S*H, there are spoilers ahead. It has been 40 years after all. Instead of simply having Blake leave the show, the writers saw this as an opportunity to truly highlight the “wastefulness” of conflict. They decided to write Blake off in a very final way.

Screenshot from the TV show M*A*S*H (1972-1983)Twentieth Century, M*A*S*H (1972-1983)

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Who Knew About Henry Blake?

The answer to our question is almost nobody. The writers gave the cast the script for Blake’s last episode, “Abyssinia, Henry”, without the last page. They handed out the page, in which Blake’s passing was announced, moments before filming. But there was one person who wasn’t surprised.

Screenshot from the TV show M*A*S*H (1972-1983)Twentieth Century, M*A*S*H (1972-1983)

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Who Knew About Henry Blake?

The cast lost their minds when the ending of the episode was revealed to them. One cast member, however, supposedly knew the truth before this moment. It is reported that Alan Alda was told of Blake’s fate ahead of time.

Screenshot from the TV show M*A*S*H (1972-1983)Twentieth Century, M*A*S*H (1972-1983)

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They Had Amazing Writers

As the story of “Abyssinia, Henry” suggests, M*A*S*H had some of the best writers around. In 2013, The Writers Guild ranked the show as the fifth best-written TV series of all time. It beat out crowd favorites like The Mary Tyler Moore Show, Cheers, and The Wire.

Gary Burghoff Pat Stevens Mash 1977CBS Television, Wikimedia Commons

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Named After Angels

The writers may have been the best of the best. However, after six seasons with a revolving door of side characters, they started running out of ideas. One episode that season featured four characters named after the infield of the Los Angeles Angels.

Gary Burghoff Radar Mash 1976CBS Television, Wikimedia Commons

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The Props Were Worth Big Money

The characters of M*A*S*H were all known for their quirks—it’s part of what made them all loveable. Radar had a teddy bear he slept with during the entire series. When that bear sold at auction in 2014, it sold for $14, 307.

Mash Tv Cast 1975CBS Television, Wikimedia Commons

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It Was Longer Than The Conflict

M*A*S*H was all about the Korean War. The Korean conflict lasted for three years, one month, and two days. M*A*S*H aired for 11 years.

Gary Burghoff Loretta Swit Alan Alda Mash 1977CBS Television, Wikimedia Commons

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Alan Alda Does It All

Many fans will tell you that M*A*S*H would be nothing without Alan Alda. In some ways, they would be right. Not only was Alda an essential actor, but he also co-wrote 13 episodes and directed 31 episodes.

Tom Sullivan Alan Alda Out Of Sight Out Of Mind Mash 1976CBS Television, Wikimedia Commons

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Alda Also Breaks Records

Alan Alda was also recognized for his work both in front of the camera and behind it. He was the first person to ever win an Emmy for acting, directing, and writing on the same series.

Loretta Swit Mash WeddingCBS Television, Wikimedia Commons

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Who Wasn’t On M*A*S*H?

M*A*S*H had many guest stars who went on to make a name for themselves. This list includes Ron Howard, Leslie Nielsen, Patrick Swayze, John Ritter, Laurence Fishburne, Pat Morita, Rita Wilson, and Teri Garr.

Happy Days Motorcycle Richie Fonzie 1977ABC Television. Wikimedia Commons

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The Series Finale

M*A*S*H ended on February 28, 1983in its final episode, “Goodbye, Farewell and Amen”. It was a two-and-a-half-hour special, and it was said that 77% of the American television viewers that night were watching M*A*S*H.

Screenshot from the TV show M*A*S*H (1972-1983)Twentieth Century, M*A*S*H (1972-1983)

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The Series Finale

When you break that down into numbers, 121.6 million people watched the finale when it aired. It was the most-watched broadcast in American history at the time. It wasn’t passed until 2010, as more people tuned into Super Bowl XLIV.

Screenshot from the TV show M*A*S*H (1972-1983)Twentieth Century, M*A*S*H (1972-1983)

The Spin-Offs

They attempted to make several spin-offs from M*A*S*H. However, none of them could capture the magic of the original show. They were all short-lived and promptly forgotten.

Screenshot from the movie W*A*L*T*E*R (1984)Twentieth Century, W*A*L*T*E*R (1984)

They Made A Time Capsule

The characters of M*A*S*H buried a time capsule in their second to last episode, “As Time Goes By”. This time capsule was buried on set and left in the ground to be found. The hunt was short-lived.

Screenshot from the TV show M*A*S*H (1972-1983)Twentieth Century, M*A*S*H (1972-1983)

They Made A Time Capsule

The land was sold two months after filming ended. Not long after, construction started on the property and the workers dug up the time capsule. Alan Alda told them to keep it; supposedly the workers weren’t that impressed.

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Screenshot from the TV show M*A*S*H (1972-1983)Twentieth Century, M*A*S*H (1972-1983)

Sources: 1, 2, 3, 4


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