Ralph Bellamy as Dr. Kenyon Walker

Polly Bergen as Mona Briarly

Theodore Bikel as Otto Gruenwaldt

Sonny Bono as Jack Marshall

Dane Clark as Ray Garwood

Laraine Day as Claire Garwood

Fernando Lamas as Paul Barons

George Maharis as Robert Davenport

Farrah Fawcett as Karen White

Hugh O'Brian as Detective Daniel Myerson

Molly Picon as Ida Goldman

Walter Pidgeon as Charlie Parkins

Robert Stack as Captain Larkin

Brooke Adams as Vera Franklin

Danny Bonaduce as Millard Kensington

Vincent Baggetta as Fred Connors

Rosemarie Stack as Dorothy Saunders

Elizabeth Stack as Marilyn Stonehurst

Steve Franken as Donald Goldman

Philip Sterling as Benny Cummings

Pepper Martin as Bomb Man

Yolanda Galardo as Alice Quincy

Bob Hachman as Operations Man

Don Hanmer as Priest

Glorie Haufman as Ticket Taker

Byron Morrow as Diplomat

George Petrie as Ferguson

Dave Shelley as Harold