character - Harter

character - Minister

character - Captain

character - Technician #2

character - Zed

character - Bill

character - Clifford

character - Jerry Wade

character - FBI Agent

character - Dr. Winton Weiss

character - Mitchell Demming

character - Commander

character - Lane Curran

character - Tom Brown

character - Ed

character - Guard Russell

character - Dan Daubrey

character - College Professor

character - Hardin

character - Iceman

character - Father Jeremy Hogan

character - Deputy Sheriff Hank Matson (as Brett Parker)

character - Vic Hancock

character - Countdown Technician

character - Engineer (uncredited)

character - Hans - Officer #2 (uncredited)

character - Danny O'Day

character - Frank Parker - Tenor Singer