Creature

Stan Ivar

Mike Davison

Wendy Schaal

Beth Sladen

Lyman Ward

David Perkins

Klaus Kinski

Hans Rudy Hofner

Annette McCarthy

Dr. Wendy H. Oliver

Marie Laurin

Susan Delambre

Robert Jaffe

Jon Fennel

Diane Salinger

Melanie Bryce

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John Stinson

Astronaut #1

Buckley Norris

Concord Technician #1

Eileen Seeley

Loudspeaker - Concord (voice)