Characters played by John Loder
Don Rainsford
Characters played by Audrey Long
Ellen Trowbridge
Characters played by Edgar Barrier
Erich Kreiger
Characters played by Russell Wade
Robert Trowbridge
Characters played by Russell Hicks
Mr. Whitney
Characters played by Jason Robards Sr.
Captain (as Jason Robards)
Characters played by Gene Roth
Pleshke (as Gene Stutenroth)
Characters played by Noble Johnson
Carib
Characters played by Robert Clarke
Helmsman