Doris Packer who plays Oliver Windell Douglas' (Eddie Albert) mother is only two years older than him.
The names Alice Faye, Winnie Lightner, and Slim Summerville are mentioned in the confusion about whether the story is a movie and a musical. While all three of these names go with actors who were in the movies and, at one time or another, in musicals none of the three ever appeared together with either one of the other two.
While both the accordion and the concertina are from the family of musical instruments know as free-reed instruments, the instrument Lastvogel's father plays is a concertina not an accordion. Calling it an accordion, however, allows for the comedic element of mispronouncing it an 'accrodian'.
Although the movie Paint Your Wagon (1969) was come out until two years after this episode originally aired, the aspiration Cornelius Reinholt has to paint a Gypsy wagon, made in the form of a request to 'paint your wagon', is a tongue-in-cheek allusion to the Alan Jay Lerner and Frederick Loewe musical, on which the movie is base, that originally ran on Broadway for 286 performances in 1951-52.
Lisa says the ring was smuggled past the Nazis in a vat of "chickens fat."