Lex Luthor steals a jewel found by Lana's archaeologist father.

A rival is out to kill the mobster father (Edward Winter) of Clark's new flame.

Superboy must save Lana from a deluded man (Abe Vigoda).

A scientist (Ray Walston) accuses a Soviet exchange student of sabotage.

A collegian (Doug Barr), planning to steal a new weapon, kidnaps Lana.

Clark investigates mishaps at an amusement complex.