- Maxwell Smart - Don Adams
- Agent 99 - Barbara Feldon
- The Chief - Edward Platt
- Agent 34 - Ralph Leabow
- Larrabee - Robert Karvelas
- Agent 72 (Sam) (Uncredited)
- Mr. Peter (Fat Man) - Berry Kroeger
- Mr. Sydney (Little Man) -Phil Roth
- Wilbur - Buddy Hackett (uncredited)
- Trinka Markoff - Roxane Berard
- Mrs. Weatherly (Girl) - Lynn Borden
- Reporter - Don Ross
- Man in Cab - Gordon Jump
- Lubella Markoff (mentioned)
Weapons and Gadgets
Director Bruce Bilson won the 1968 Emmy Award for Outstanding Directorial Achievement in Comedy for this episode.
Hiding behind the generic title this episode is a parody of hard-boiled detective movies, especially 1941's The Maltese Falcon, giving Don Adams his second of three opportunities to show off his Humphrey Bogart impression (the others being Episode #36: "Casablanca" and Episode #117 "The Treasure of C. Errol Madre").
The "Big Man" and "Little Man" villains are caricatures of frequent Bogart co-stars Sydney Greenstreet and Peter Lorre with the twist that their names have been reversed (a similar pair appear in the earlier Casablanca-themed episode) while "Wilbur" refers to Maltese Falcon character "Wilmer Cook" and "Mrs. Weatherly" to "Miss Wonderly", the femme fatale of the movie.