This television episode refers to:
October 1, 1955 - September 20, 1956
Harry tells Pete that Ken Cosgrove is engaged, and that his father-in-law to be is rich, giving Ken and his fiancee tickets to the opera. Harry remarks that his father-in-law is just a bus driver, so the only place his father-in-law can take him is to the moon. This is a reference to the television series The Honeymooners, where the main character Ralph Kramden, is a bus driver, one of his catchphrases being "To the moon!".