Jeff Gordon, Secret Agent (1963)

FBI agent Jeff Gordon searches for Grégori, a crook who was wounded during a spectacular jewel heist. Aided by Lisa Lambert, a private investigator, Jeff goes to a nursing home in which he thinks he will find a clue to Grégori whereabouts. The sinister-looking business is run by Mercier, a crooked doctor who performs plastic surgery in a secret operating room on gangsters wishing to alter their appearance and fingerprints. Not only do Jeff and Lisa have to deal with Grégori and Mercier, but a rival gang is hitching to help themselves to the stolen gems.