MASH - Season 5 Episode 11 -

While Colonel Potter goes to Tokyo on R&R, his horse develops colic. Klinger becomes chronically depressed, and Hot Lips gets appendicitis. The horse is flushed out with a hose, Hawkeye and B.J. perform an appendectomy on Hot Lips, and all are well when Potter returns, except Klinger. Potter offers Klinger a discharge for severe depression, and Klinger gets very excited, which loses him the discharge.