MASH started as a little-watched sitcom but became an iconic series after changing its genre. With its final episode in 1983, it still holds the record for the most-watched TV episode 40 years later. This reflects not only the show's popularity but also a time before the internet, streaming, or DVDs.

Considering that it faced cancellation after its first season, it's quite surprising that MASH became a turning point. The first season received poor ratings, but it managed to survive thanks to reruns. Over time, it became a production that won the hearts of viewers, standing out with both its funny and tear-jerking scenes.

MASH also broke new ground by blending comedy and drama. Although it was promoted with an anti-war theme, the early seasons focused more on comedic elements. By the end of its 11 seasons, the show had transformed into a more straightforward medical drama, especially with Alan Alda taking more creative control.

It took time for MASH to find its formula. The first season was entertaining but uneven; however, it showed significant improvement starting from the second season. Particularly, the shocking finale of the third season marked the show's transition from comedy to dramedy, solidifying its status as a classic.

In the early 1970s, television offered safer content; there was no harsh violence or foul language, and the deaths of main characters were rarely seen. MASH was one of the first shows to break this rule with the unexpected death of Henry Blake, played by McLean Stevenson, in the third season finale. This event left viewers both heartbroken and angry, permanently changing the tone of MASH.