Concerned that Stanley's behavior suggests that Stanley may be turning into a criminal, Hal decides to block Stanley from any wrongdoing — and keeps getting in the way of Stanley stopping a major jewel heist.

Spies steal Mr. Terrific′s power-pill formula, and because the pills only work on Stanley, the thieves also need to kidnap Stanley, brainwash him, and sell him to the highest bidder.

The government sends Stanley on a mission to catch a crime gang that requires him to impersonate a safecracker who looks exactly like him, fool the man's girlfriend, and somehow convince the gang that he knows how to break into bank vaults.