M*A*S*H - Season 8 Episode 17 Heal Thyself Goodbye, Farewell, and Amen.
Overview: Colonel Potter turns crotchety when he catches the mumps, and his condition is worsened when Winchester gets the same disease and has to be quarantined with him. A temporary replacement surgeon, Newsome, is quickly brought into the 4077th and seems to be a gem in terms of both personality and ability.