Trivia / M*A*S*H S4 E7: Dear Mildred

• The Cast Showoff: William Christopher shows off his singing talents alongside Barbara O'Connor (his real-life wife) when they both sing "All Dressed Up and No Place to Go".
• Directed by Cast Member: Alan Alda
• First Appearance: Sophie the horse
• Real-Life Relative: Lieutenant O'Connor, who sings a duet with Father Mulcahy in one scene, is played by William Christopher's wife Barbara
• Special Effect Failure: When the horse's legs break through the walls of the supply room, you can just barely see one of the fake legs break and splinter as well.