Characters played by Margaret Sheridan
Nikki Nicholson
Characters played by Kenneth Tobey
Capt. Patrick Hendry
Characters played by Robert Cornthwaite
Dr. Arthur Carrington
Characters played by Douglas Spencer
Ned Scott
Characters played by James Young
Lt. Eddie Dykes
Characters played by Dewey Martin
Crew Chief Bob
Characters played by Robert Nichols
Lt. Ken Erickson
Lt. Ken (Mac) MacPherson
Characters played by William Self
Cpl. Barnes
Characters played by Eduard Franz
Dr. Stern
Characters played by Sally Creighton
Mrs. Chapman
Characters played by James Arness
'The Thing'
Characters played by Edmund Breon
Dr. Ambrose
Characters played by Nicholas Byron
Tex Richards
Characters played by John Dierkes
Dr. Chapman
Characters played by George Fenneman
Dr. Redding
Characters played by Lee Tong Foo
Lee - a Cook
Characters played by Paul Frees
Dr. Vorhees
Characters played by Everett Glass
Dr. Wilson
Characters played by 'King Kong' Kashey
Eskimo
Characters played by David McMahon
Brig. Gen. Fogarty
Characters played by Bill Neff
Bill Stone
Characters played by Walter Ng
Second Cook
Characters played by Charles Opunui
Eskimo
Characters played by Norbert Schiller
Dr. Laurence
Characters played by Robert Stevenson
Capt. Smith - Fogarty's Aide
Characters played by Riley Sunrise
Eskimo