Ronny Graham - who plays drunk bomb technician Sgt. Gribble in this episode - also served as a story consultant for the remainder of the series, starting with this season, and wrote several episodes. This episode marks his first as a writer on the series.
When BJ hits the board with a hammer while playing Double Cranko, a chess piece bounces into his glass. When he pours his gin shortly after, you can see the confusion upon noticing the piece. In fact later, at the end of the episode when Potter is playing, u can see the same chess piece still in the glass next to the board.
At the end of the episode, when potter is learning to play double cranko, u can see the chess piece in the martini glass from the beginning.
In this episode Radar takes to playing a new shipment of records over the camp's p.a. system. He soon develops a real 1950's DJ style of talking. On July 11, 1951, DJ Alan Freed began broadcasting on WJW in Cleveland. Freed played R&B music and mixed a liberal amount of "hipster" language into his on air speech. But before Freed, in 1948, was a black DJ named Holmes Daylie. His nickname was Daddy-O (a name he copywrited in 1948) and his show was "Jazz from Dad's Pad". He played Jazz and Be-Bop, was known for hip rhyming patter and was a real "Hepcat".
By coincidence, Ronny Graham, the actor who played Sgt. Gribble - their thoroughly inebriated blood donor from a nearby bomb-disposal unit, died of liver disease.