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.
Two Mexican fishermen show Mike a net with an odd hole in it and claim an unknown species of sea monster caused it. Mike, using whale-tracking equipment and underwater microphones, risks his life to track and trap the 'monster.'
S1E37 26 min
