An untrustworthy fight manager puts together a dangerous fight.
Mike takes a group of future space pilots to the bottom of the sea, where many survival problems are similar to those encountered in outer space. But a sudden hurricane washes their boat away, stranding them underwater.
An amateur salvage diver carelessly examines a sunken freighter, causing a two-ton spool of heavy lead cable to roll down the deck. It rolls over his legs and pins him down. Mike Nelson responds to the emergency call.
A coastal fisherman wages a private war against kelp harvesters in his area. The fisherman has a diabolical scheme to destroy the kelp harvesters' boat with a mine, but Mike steps in to prevent a tragedy.
