A Soviet agent murders American spies across Europe, forcing an intelligence agency to recruit ordinary citizens.
In Madrid, the team pursues a renegade KGB general bent on exploding a nuclear bomb; guest Ruth Buzzi.
An espionage ring targets a Middle East conference in Munich; guests Tanya Tucker, Barbara Rush, Cornel Wilde, Alan Thicke.
A French syndicate is responsible for hijacking a medical-aid shipment bound for Africa; guests Garrett Morris, Tony Franciosa.
The NIA must foil a deal for a deadly camera; guests Claude Akins, Martin Milner, Lloyd Bochner.
A stolen satellite-defense system is on the block to the highest bidder; guests Michael Constantine, Alejandro Rey, Henry Gibson.
An NIA traitor participates in a coup attempt on a Caribbean island.
A terrorist captures a Kuwaiti oil field and demands the release of eight jailed comrades.
The team has only five days to find a secret American sub sunk in the Black Sea.
A Soviet physicist wants to defect during a scientific conference in Nice.
In Hawaii, a white-slavery ring captures a senator's daughter.
A courier carrying missile-launch codes is robbed and murdered on a jet.
An NIA agent is killed while investigating a security leak at the U.S. embassy in Rio de Janeiro; guests Eve Plumb, Tab Hunter.