Death stalks an art gallery where paintings are disappearing and the curator has been murdered. Smith: Richard Wyler. Fliegler: Ralph Michael. Terrance: Robert Ayres. Collins: Garard Green. Gerhardt: Walter Gotell.
A crudely scrawled letter becomes a vital clue in the kidnapping of an ambassador's son. Haja: Ferdy Mayne. Smith: Richard Wyler. Mrs. Haja: Lorraine Clewes. Tanner: Marion Mathee. Alain: Derek Bloomfield. Steven: Christopher Whitty. Mercer: John Longden.
A dead thief's ex-cellmate is Smith's only link to a cache of stolen money. Smith: Richard Wyler. Haynes: Pete Murray. Julie: Jill Williams. Parro: Anthony Jacobs. Wilson: Geoffrey Hibbert. Martin: Paul Craig. Miles: Kevin Steney. Mercer: John Longden.
Smith steps in when a prominent scientist disappears on the morning of a crucial atomic test. Krello: Bill O'Connor. Smith: Richard Wyler. Granz: Colin Tapley. Mullins: Diane Shesney. Wallace: Michael Peake.