David Keith as Mason Rand

Stephanie Niznik as Dr. KC Czaban

Ryan O'Neal as Allen Lysander

Brian Thompson as Captain Tower

Steve Bond as Colonel Tell

Craig Wasson as Hudson

Michael Cavanaugh as Williams

Shannon Lee as Pamela

James Avery as Dr. Solomon Holt

James Hong as Ambassador Po

Joseph Patrick Kelly as Control Tech

Donald Li as Chinese Scientist

William Zabka as Rover Driver Joe

Marc McClure as German Scientist

Eloy Casados as Mexican Doctor