Dennis Weaver
— Lt. Joe Hardy
Lois Nettleton
— Anne Wilson
Anne Francis
— Marie Hardy Forrest
Andrew Duggan
— William Forrest
Percy Rodriguez
— Capt. Jackson
Pamelyn Ferdin
— Sharon Hardy
Robert Doyle
— Maj. Everett
James Hong
— Maj. Thon
Frank Maxwell
— Col. Thompson
Carl Reindel
— Lt. Diamonte
John S. Ragin
— Maj. Parkman
Vernon Weddle
— Surgeon
Duncan Inches
— Motel Owner
Ken Freehill
— Airport Man (uncredited)
Bob Harks
— Interne (uncredited)