Four characters stayed for the entire 11 season show; Hawkeye, Father Mulcahy, Margaret and Klinger.
4 characters were on the show for all 11 seasons Hawkeye Pierce Father Mulcahy Margaret "Hot Lips" Houlihan Max Klinger (frequent character first 3 seasons, regular character from season 4 on)
Loretta Swit played the role of Margaret 'Hot Lips' Houlihan during the entire run of the series.
September 1972
September 17, 1972
Hawkeye
Four characters stayed for the entire 11 season show; Hawkeye, Father Mulcahy, Margaret and Klinger.
Colonel Sherman Tecumseh Potter replaced Henry Black at the beginning of the 3rd season of the CBS television show, M*A*S*H, and stayed with the show until its finale in 1983. The only nickname that the show provided for the Colonel is "Sherm".
Margaret Brown was eventually called the "Unsinkable Molly Brown" but she was only called Molly for the Broadway show because that rhymes with more words than Margaret.
MASH is a very serious show that has a lot of comedy in it to soften the seriousness of the theme.
4 characters were on the show for all 11 seasons Hawkeye Pierce Father Mulcahy Margaret "Hot Lips" Houlihan Max Klinger (frequent character first 3 seasons, regular character from season 4 on)
Loretta Swit played the role of Margaret 'Hot Lips' Houlihan during the entire run of the series.
MASH
Iowa
MASH was not the oldest TV show, nor was it the longest running show. See the link below for a complete list.
1950s
Gin