Thor [Doctor Donald Blake]; Jane Foster; Colonel Edward Harrison (introduction); John Blandings (Scientist) (introduction); Mrs. Silvia Blandings; Scientists; Photographer (Russian Spy); Russian Soldiers
In order to solve the mystery of a rash of defecting American scientists, Dr. Blake uses himself as bait and is abducted by communists. He is imprisoned with the other missing scientists, but is able to transform into Thor and free them all.
The first one to make the nightmarish discovery was a fisherman...
A sea serpent is sighted and causes panic, drawing a military response culminating in a nuclear strike. The serpent retreats beneath the surface, but a reporter that communicated with it explains that it was a harmless lost alien child. And if that's the child, how big will the parents be?