- Robert Vaughn
- Napoleon Solo
- David McCallum
- Illya Kuryakin
- Barry Sullivan
- Dr. Robert Kingsley
- Eleanor Parker
- Margitta Kingsley
- Leslie Nielsen
- Gen. Maximilian Harmon
- Leo G. Carroll
- Alexander Waverly
- Tony Bill
- Steven Garrow
- Peter Mark Richman
- Mr. Webb
- Albert Paulsen
- Dr. Kurt Erikson
- Inger Stratton
- Anna Erikson
- Hugh Marlowe
- Grant
- Dan O'Herlihy
- Prof. David Garrow
- Ruth Warrick
- Alice Garrow
- David Hurst
- Dr. Jan Vanovech
- Barbara Moore
- Lisa Rogers
- Arthur Hanson
- Paul Mackie
- Richard Bull
- Capt. Gelser
- Amy Thomson
- Miss Carla
- Edgar Stehli
- Veeth
- Annella Bassett
- Dr. Naomi Fisher
- Logan Ramsey
- Ship's Captain
- Guy Lee
- Cab Driver
- Ray Weaver
- Reporter
- Michael Masters
- Reporter
