Patrick McGoohan
— Dr. Harvey Langston
Amanda Plummer
— Myrna Malloy
Joanne Vannicola
— Blair
Emmanuelle Vaugier
— Veronica Bloom
Gregory Hlady
— Syd Meeker
Joseph Wynne
— Bobby Corrado
Ralph Allison
— Hollister Watchel
Louis Di Bianco
— Mr. Corrado Sr.
Jocelyne Zucco
— Mrs. Corrado
Lynn Snelling
— Nympho
Michael Maloney
— Dr. Samuel Fry
Sam Stone
— Vern Huckabee
David Francis
— Dr. Andrew Miller
Mark Bromilow
— Dr. Dan Wyatt
Rodrigue Proteau
— Bald Man
Lorne Brass
— Sheriff Grierson
Susan Glover
— Mrs. Schmidt
Renee Madeline Le Guerrier
— Psycho Girl
Gaétan Gingras
— Epileptic
Robert Higden
— Man at piano bar