Calificación
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Bradford Dillman
Dobler

Priscilla Barnes
Claire

Daryl Haney
O'Neill

Mel Ryane
Barbara

Eb Lottimer
Seaver

Gregory Sobeck
Engel

Richard Young
Chadwick

Stephen Davies
Fernandez

John Lafayette
Shuttle commander

Michael Adams
Shuttle crewman

Karen Winograd
Shuttle crewwoman

Roger Corman
Corporate executive (uncredited)