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.
Checking the underwater security of a newly-constructed turbo-electric dam, Mike Nelson discovers dynamite set in one of the intake valves. He races against time to catch the saboteurs and save the dam from explosive destruction.
S2E12 26 min
