"A biochemist develops a process that reverses ageing but, when he disappears, it's up to Napoleon Solo and Ilya Kuryakin to recover or destroy the process before it falls into the hands of the THRUSH."
Robert Vaughn
as Napoleon Solo
David McCallum
as Illya Kuryakin
Leo G. Carroll
as Alexander Waverly
Maurice Evans
as Sir Norman Swickert
Vera Miles
as Madame Raine De Sala
Ann Elder
as Joanna Sweet
Yvonne Craig
as Wanda
Bernard Fox
as Jordin
Harry Davis
as Prof. Alexander Gritsky
Monica Keating
as Olga
Dolores Faith
as Lorelei Lancer
Ahna Capri
as Do Do (as Anna Capri)
Cal Bolder
as Fleeton
James Doohan
as Phillip Bainbridge
Ollie O'Toole
as Corvy
Anthony Eustrel
as Steward
Richard Peel
as Cat Man
Barry Bernard
as Pet Shop Owner
Robert Easton
as Mr. Bentley - the Texan
Howard Rodman
Writer
E. Darrell Hallenbeck
Director
Henry Slesar
Story
Gerald Fried
Original Music Composer
Robert Drasnin
Fred J. Koenekamp
Director of Photography