Tim Holt
Lt. Cmdr. John 'Twill' Twillinger
Hans Conried
Dr. Jess Rogers
Mimi Gibson
Sandy MacKenzie
Charles Herbert
Boy with Morty's Cap
William Forrest
Admiral Greenhouse
Wallace Earl
Sally
Audrey Dalton
Gail MacKenzie
Max Showalter
Dr. Tad Johns
Harlan Warde
Lt. Robert 'Clem' Clemens
Ralph Moody
Watchman at Lock 57
Milton Parsons
Lewis Clark Dobbs
Gordon Jones
Sheriff Josh Peters
Sarah Selby
Mrs. Simms
Charles Tannen
Seaman Wyatt (Radioman)
David McMahon
Patterson
Byron Kane
Coroner Nate Brown
Barbara Darrow
Jody Simms
Jody McCrea
Seaman Fred Johnson
William Swan
Seaman Howard Sanders
Joseph Hamilton
Other Lock Watchman
Hal Taggart
Davis - Resort Owner
Mack Williams
Captain Masters