The bridge being built is the Golden Gate Bridge, spanning San Francisco Bay, which opened in 1937.
The Professor calls his secret formula "Samsonite," but there is no connection with the famous luggage brand. The Shwayder Trunk Manufacturing Company named one of its cases "Samson", after the Biblical strongman, and only began using the trademark "Samsonite" the same year this film was made.
The icicles hanging from the bridge were made of a combination of paraffin wax and melted sugar.
A rare instance of the famously bald Ed Brophy wearing a toupee.
This film's earliest documented telecast took place in Tucson Wednesday 19 September 1956 on KDWI (Channel 9); it first aired in Albuquerque Wednesday 17 October 1956 on KOAT (Channel 7), in Salt Lake City Thursday 25 October 1956 on KUTV (Channel 2), in Sacramento CA Wednesday 14 November 1956 on KCRA (Channel 3), in Chicago Friday 15 March 1957 on WGN (Channel 9), and in Phoenix Sunday 14 July 1957 on KVAR (Channel 12).