Calificación
Reparto

Donald Sutherland
Frank Lansing

Vanessa Redgrave
Heddi Lindquist

Richard Widmark
Otto Gerran

Christopher Lee
Lechinski

Barbara Parkins
Judith Rubin

Lloyd Bridges
Smithy

Lawrence Dane
Paul Hartman

Patricia Collins
Inge Van Zipper

Michael J. Reynolds
Heyter

Nicholas Cortland
Jungbeck

August Schellenberg
Marine Technician

Candace O'Connor
Laboratory Assistant

Joseph Golland
Meteorological Assistant

Bruce Greenwood
Technician (Tommy)

Richard Wren
Radio Operator

Hagan Beggs
Larsen