* Peter Boyle is a protective father who is bossy and looking for his daughter. He eventually finds her, along with...
* A young Mark Harmon playing a farmer stud from Iowa. He's a romantic item for her and surprisingly-good with a machine gun later.
* Shirley Jones plays a Nurse. She does nurse stuff, but mostly just reacts to the events.
* Slim Pickens plays a rich Texan who is called, you guessed it, Tex. That's creative.
* Jack Warden plays a blind man who is taken to the rescue point alongside his doting, but strong wife.
* Karl Malden's assistant character has a secret: he's dying of a disease that they never bother to name.
==========The group wanders around the ship, but eventually learns that Savalas has a secret. You'd never have guessed, but he's a bad guy!