One ep starting beauty Susan Oliver playing a character named Margaret Hamilton. Another had a nobody playing a character named Frank Morgan ( or did they just mention FM?).

PS A DVD years ago erroneously mentioned WOO actor Frank Morgan as playing Col Potter on Mash. True! That of course was Harry Morgan. Some online jokes years ago on that idea had FM playing Potter and telling Hawk something like "We will operate at 3. Now go!" And Hawk replies "But if we do that Frank Burns will operate and he is no surgeon!" And Potter replies back "I SAID GO!". And lightning strikes inside Potter's office and Hawk runs and jumps through the window in his door. Funny scenario but see my very serious postings on Mash!