The Monster That Challenged the World (1957)

Trailer

Cast

• Tim Holt as Lt. Cmdr. John 'Twill' Twillinger
• Audrey Dalton as Gail MacKenzie
• Hans Conried as Dr. Jess Rogers
• Barbara Darrow as Jody Simms
• Max Showalter as Dr. Tad Johns
• Harlan Warde as Lt. Robert 'Clem' Clemens
• Gordon Jones as Sheriff Josh Peters
• Mimi Gibson as Sandy MacKenzie
• Marjorie Stapp as Connie Blake
• Jody McCrea as Seaman Fred Johnson
• Dennis McCarthy as George Blake (lab assistant)
• Sarah Selby as Mrs. Simms
• Milton Parsons as Lewis Clark Dobbs
• Charles Tannen as Seaman Wyatt (Radioman)
• John Close as Deputy Larry
• William Forrest as Admiral Greenhouse
• Gil Frye as Deputy Scotty
• Joseph Hamilton as Other Lock Watchman
• Charles Herbert as Boy with Morty's Cap
• Ralph Littlefield as Gatekeeper
• David McMahon as Patterson
• Ralph Moody as Watchman at Lock 57
• William Swan as Seaman Howard Sanders
• Hal Taggart as Davis - Resort Owner
• Mack Williams as Captain Masters

Crew

• Arnold Laven · Director
• David Duncan · Writer
• Pat Fielder · Writer
• Arthur Gardner · Producer
• Jules V. Levy · Producer
• Heinz Roemheld · Composer
• Lester White · Cinematographer
• John Faure · Editor
• Kerwin Coughlin · Casting director