Marks the first appearance of character actor Vito Scotti who would go on to play Dr. Boris Balinkoff in two later episodes.
During the production of this installment, extra footage was filmed for 'flashbacks' in the later episode "Diogenes, Won't You Please Go Home?".
The part of the Japanese submariner was played by Italian-American actor Vito Scotti. Shown with squinty eyes, thick glasses and buck teeth, which was a typical Japanese stereotype in movies and TV in that era. This is very much like the role that Mickey Rooney played in Breakfast at Tiffany's (1961).