- Patrick Jordan - Photo Lab Aide
- Howard Lang - Naval Commader, at the "Valkyrie" wreck (uncredited)
- Leonard Sachs - Dialogue Scientist at Conference (bit)
- Ernest Blyth - Scientist at Conference (uncredited)
- Neal Arden - TV Newscaster (uncredited)
- Paul Beradi - Man Listening to Car Radio (uncredited)
- Max Faulkner - PLA Radio Operator (uncredited)
- Neil Hallett - Dr. Sampson's Helicopter Pilot (uncredited)
- André Maranne - French Radio Officer (uncredited)
- Derren Nesbitt - The Radar Operator, at the radar room (uncredited)
- Guy Standeven - Naval Officer in Situation Room (uncredited)
- Eugène Lourié
- Eugène Lourié
- Alan J. Adler
-
Ted Lloyd, David Diamond
Gene Evans interpreta a Steve Karnes en la película.
André Morell hace el papel de Prof. James Bickford.
Leigh Madison hace el papel de Jean Trevethan.
John Turner interpreta a John en la película.
Alastair Hunter hace el papel de Dr. C. A. Morris, the village doctor.
Lloyd Lamble interpreta a Senior Admiral, at the Admiralty en la película.
Jack MacGowran interpreta a Dr. Sampson, the paleontologist en la película.
Maurice Kaufmann interpreta a Mini Submarine Officer en la película.
Henri Vidon interpreta a Tom Trevethan en la película.
Patrick Jordan interpreta a Photo Lab Aide en la película.
Howard Lang interpreta a Naval Commader, at the "Valkyrie" wreck (uncredited) en la película.
Leonard Sachs interpreta a Dialogue Scientist at Conference (bit) en la película.
Ernest Blyth interpreta a Scientist at Conference (uncredited) en la película.
Neal Arden interpreta a TV Newscaster (uncredited) en la película.
Paul Beradi interpreta a Man Listening to Car Radio (uncredited) en la película.
Max Faulkner interpreta a PLA Radio Operator (uncredited) en la película.
Neil Hallett interpreta a Dr. Sampson's Helicopter Pilot (uncredited) en la película.
André Maranne interpreta a French Radio Officer (uncredited) en la película.
Derren Nesbitt hace el papel de The Radar Operator, at the radar room (uncredited).
Guy Standeven hace el papel de Naval Officer in Situation Room (uncredited).
Capítulo disponible en las siguientes plataformas:
