When Jimmy finds the mailbox belonging to John Black, an envelope is in the mail slot below and the bottom of an upside down Batman symbol is visible.
Lois Lane's mother Ellen is played by Phyllis Coates, who previously played Lois Lane in Superman and the Mole-Men (1951) and the first season of Adventures of Superman (1952).
This episode marks the final appearance of Michael Landes as Jimmy Olsen on the series. Jimmy was played by Justin Whalin from Season Two onwards.
This episode marks the final appearance of Chris Demetral as Jack, who is never subsequently mentioned.
This is the only episode in which Ellen Lane was played by Phyllis Coates. In all of the character's subsequent appearances, she was played by Beverly Garland.