导演 Arnold Laven

Lt. Cmdr. John 'Twill' Twillinger 蒂姆·霍尔特

Gail MacKenzie Audrey Dalton

Dr. Jess Rogers Hans Conried

Jody Simms Barbara Darrow

Dr. Tad Johns Max Showalter

Lt. Robert 'Clem' Clemens Harlan Warde

Sheriff Josh Peters Gordon Jones

Sandy MacKenzie Mimi Gibson

Connie Blake Marjorie Stapp

Seaman Fred Johnson Jody McCrea

Sally Wallace Earl

George Blake (lab assistant) Dennis McCarthy

Mrs. Simms Sarah Selby

Lewis Clark Dobbs Milton Parsons

Seaman Wyatt (Radioman) Charles Tannen

Seaman Morty Beatty Robert Benevides

Monster Victim John Carlyle

Deputy Larry John Close

Admiral Greenhouse William Forrest

Deputy Scotty Gil Frye

Other Lock Watchman Joseph Hamilton

Boy with Morty's Cap Charles Herbert

Coroner Nate Brown Byron Kane

Gatekeeper Ralph Littlefield

Patterson David McMahon

Watchman at Lock 57 Ralph Moody

Seaman Howard Sanders William Swan

Davis - Resort Owner Hal Taggart

Captain Masters Mack Williams

Deputy Brewer Dan Gachman

Clarke Michael Dugan