It Came from Beneath the Sea (1955)

It Came from Beneath the Sea is a 1955 American black-and-white science fiction giant monster film from Columbia Pictures, produced by Sam Katzman and Charles Schneer, directed by Robert Gordon, that stars Kenneth Tobey, Faith Domergue, and Donald Curtis.

Plot
While on a routine mission, Cmdr. Pete Mathews (Kenneth Tobey) runs into trouble when his submarine is nearly sunk by an unlnown creature. Back at base in Pearl Harbor, Dr. John Carter (Donald Curtis) and Professor Lesley Joyce (Faith Domergue) identify the beast as a giant octopus from the nether reaches of Mindanao Deep, which has been awakened by nearby nuclear testing. Radioactive and monstrously huge, the rampaging leviathan is heading toward the North American Pacific Coast.

Cast

 * Kenneth Tobey as Commander Pete Mathews
 * Faith Domergue as Professor Lesley Joyce
 * Donald Curtis as Dr. John Carter
 * Ian Keith as Admiral Burns
 * Dean Maddox Jr. as Admiral Norman
 * Chuck Griffiths as Lieutenant Griff
 * Harry Lauter as Deputy Bill Nash
 * Richard W. Peterson as Capt. Stacy