Mr. Terrific (1967)

S1E16 Stanley Joins the Circus

Title: Stanley Enters the Circus Plot: When a crucial code book goes missing, Stanley goes incognito and finds himself amidst the circus spectacle. To retrieve the stolen item, he must summon his strength and face off against a variety of performers, as well as a formidable gorilla, all while navigating the thrilling chaos of the big top.