A break-in and sabotage attempt occurs at a top secret research institute and the culprit is cornered and captured. The problem is that he's been badly injured and claims to have lost his memory entirely. A cat-and-mouse game ensues between investigator Tuxan, the mystery intruder Welles and the people who sent him on the mission.

• Universal Pictures
• Hal Roach Studios
• George Peppard
• Michael Sarrazin
• Christine Belford
• Cliff Potts
• James Olson
• Tim O'Connor
• James McEachin
• Alan Oppenheimer