Doppelgänger

Roy Thinnes

as

Colonel Glenn ...

Ian Hendry

as

John Kane

Patrick Wymark

as

Jason Webb

Lynn Loring

as

Sharon Ross

Loni von Friedl

as

Lisa Hartmann

Franco De Rosa

as

Paulo Landi

George Sewell

as

Mark Neuman

Ed Bishop

as

David Poulson

Philip Madoc

as

Dr. Pontini

Vladek Sheybal

as

Psychiatrist

George Mikell

as

Captain Ross

Herbert Lom

as

Doctor Hassler

Nicholas Court...

as

Data Analyst

Peter van Diss...

as

Mallory

Jon Kelley

as

Nurse