Though the film is called "Private Detective 62," neither William Powell's character nor anyone else is actually referred to by that code number.
Product placements in the film: Golden Wedding rye whiskey, Old Taylor bourbon, Ex-Lax laxatives, Camel cigarettes and Baby Ruth candy bars.
This film offers a rare example of a song written for one studio, "Isn't It Romantic?" from the Paramount musical Amami stanotte (1932), appearing in a film from another studio. Usually in this period studios owned the publishing rights to songs written for films and zealously kept other studios from using them.
Hogan tells Free that they'll soon be making so much money they'll be riding around in Hispano-Suizas. Hispano-Suiza (translated: "Spanish-Swiss") was a Spanish automobile manufacturer with factories in Spain and France that produced luxury cars, aircraft engines, trucks and weapons.