Ex-navy Underwater Demolition Team Officer Mike Nelson continues his skin-diving as a postwar profession, combining mastery of the SCUBA and spear with a flair for dangerous investigation.
Mike Nelson learns of a derelict mine that has drifted into the harbor of a nearby town. The town's principal industry, a nitrate factory, will blow up and destroy the city if the mine explodes.
S1E21 26 min
