&quot;Abyssinia, Henry&quot; is the 72nd episode of the M*A*S*H television series, and the final episode of the series&#39; third season. First aired on March 18, 1975, and written by Everett Greenbaum and Jim Fritzell, the highly rated episode was most notable for its shocking and unexpected ending. The plot of the episode centers on the honorable discharge and subsequent departure of the 4077th MASH&#39;s commander, Lieutenant Colonel Henry Blake (played by McLean Stevenson). The highly controversial ending to the episode, which has since been referenced and parodied many times, prompted an estimated 1,000-plus letters to series producers Gene Reynolds and Larry Gelbart, and drew fire from both CBS and 20th Century Fox. After the production of this episode, both Stevenson and Wayne Rogers, who played the character of Trapper John McIntyre, left the series to pursue other interests. These combined departures and their subsequent replacements signaled the beginning of a major shift in focus of the M*A*S*H series as a whole.