Stingray (1964)

S1E3 The Ghost Ship

Commander Shore and Phones find themselves captive aboard an ancient Spanish galleon commanded by Idotee, who is using it to assault other ships. Shore instructs Troy to fire Sting Missiles at the ghost ship, but Troy ignores the command and instead decides to infiltrate the vessel. Once inside the control room, he activates his air cylinders, which unbeknownst to Idotee, contain laughing gas. As a result, the alien bursts into uncontrollable laughter, completely oblivious to the fact that he has been outsmarted and taken prisoner.