Until this episode, Radar did not have a first name. Actor Gary Burghoff asked the writers to come up with one for his character. This is the first time he reveals his first name is "Walter".
One of the very few episodes to never record a laugh track, nor was one ever added in syndication.
In the title Quo vadis is a Latin phrase meaning "Where are you going?"
Col. Flagg tells Margaret and Frank that "It's the duty of every real American to be on the lookout for goldbricks, pinkos, and fellow travelers." During this time the term "Fellow Traveler" was a negative term for one who was sympathetic to communism.
When Sidney Freedman first arrives he runs into Colonel Flagg. Flagg states he and Sidney played poker together once. This is most likely a reference to Season 2's "Deal Me Out". Edward Winter played Captain Halloran from the CID. Although not directly defined the most likely explanation is Captain Halloran is one of Flagg's many aliases.