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Series Premiere. Lockwood investigates the disappearance of a State Department Official, which leads him to a private Country Club where the key to the operation may be a card game.

Tony Franciosa's first episode. Omega Probe Agent Nick Bianco travels to England to find a missing Probe agent who was investigating perfect counterfeit $100 bills.

Doug McClure's first episode. Stand-by Probe Agent C. R. Grover races against the clock to prevent an electronics expert from destroying Probe Control with a Mega-Trans Package...a device that makes anything carrying electricity self-destruct.

Lockwood tracks down the man who stole a football-sized diamond brought back from the moon.

Bianco travels to the Adriatic to determine if a missing Probe Agent was kidnapped, killed or deserting his job and his wife.

Bianco has to prevent the assassination of a diplomat by a hitman known only as ""The Iceman"".

Lockwood travels to an iron curtain country to bring out the scientist who invented a new deadly toxin and has the only formula for the cure. In the process Lockwood becomes infected by the toxin.

Grover sets out to find recluse billionaire J.R. Devlin, who has not been seen in public for 18 months.

Lockwood investigates threats against a talk-show host who is running for the U.S. Senate.

Lockwood asks for Probe Control's help in finding a friend who disappeared, along with his plane, in the desert.

Lockwood travels to San Francisco to find a gold mine that has been lost since the early 1900's.

Bianco investigates the disappearance of a woman he was once involved with...only to find the whole thing was a trap set up by the woman's jealous fiance.

Carla Lucchese, daughter of a billionaire industrialist, is shot at on her wedding day and promptly disappears. Her anxious husband hires Grover to track down his wife; however it soon emerges that other members of the Lucchese family are also on the trail-and will stop at nothing to prevent Carla from coming into her inheritance.

First episode with the new set and slightly revised format. Bianco tries to help a fellow Probe agent, who is injured and is out on his own to find the people who killed his wife and kidnapped his daughter.

Grover travels to Switzerland to investigate the black-mailing of people who have secret numbered accounts in a Swiss Bank.

Lockwood has to track down a friend who was infected by a mysterious and highly contagious disease following a deep sea dive.

Bianco goes to Washington to prevent the blackmailing of a friend who is the key to an upcoming international summit.

Grover has to find a stolen statue, which may signal the revival of an ancient criminal order.

Bianco looks for a missing comptroller, whose journals could bring down an organized crime ring.

Grover looks for Cameron, who was kidnapped from Probe Control by an old army trainee, who blames Cameron for his capture and torture during the Korean War.

Bianco's investigation of missing criminals leads him to a travel agency whose speciality is helping wanted criminals escape.

Lockwood looks for the daughter of a financial wizard who was kiddnaped...or who arranged her own kiddnapping.

Grover's search for a missing officer previously involved in a failed military coup carries him into the heart of a group planning a full-scale revolution.