The Monster That Challenged the World
as Lt. Cmdr. John "Twill" Twillinger
as Dr. Jess Rogers
as Sheriff Josh Peters
as Dr. Tad Johns
as Jody Simms
as Gail MacKenzie
as Sandy MacKenzie
as Lt. Robert 'Clem' Clemens
as Connie Blake
as George Blake
as Seaman Morty Beatty