Max: "[The courier's death was] suicide, Chief."
99: "But, Max, he was gassed."
Max: "I don't know anything about his drinking habits, 99."
- Maxwell Smart (Agent 86) - Don Adams
- Agent 99 - Barbara Feldon
- The Chief - Edward Platt
- Agent 44 - Victor French
- Dr. Minelli (Scientist) - Del Close
- The Courier (Agent 85) - Jack Donner
- Agent 82, deceased (mentioned)
- Agent 83, deceased (mentioned)
- Agent 84, deceased (mentioned)
- Agent B-12 (mentioned)
- Ernst (British Spy) - Bill Glover
- Cyril (His dog, also known as Krochanska) (uncredited)
- Countess Rifchevsky - Carol Ohmart
- The Porter - Maurice Marsac
- Special Guest Conductor - Johnny Carson
Weapons and Gadgets
- An editing error shows Max picking up a handful of chess pieces from Dr. Minelli's board, and then setting them down twice.