Tomorrow's Tide

While walking on an ocean beach with Galen, Virdon and Burke see a condemned man lashed to a raft in the water. They rescue him and carry him to a nearby cave but then an ape-on-patrol captures the two astronauts and takes them to his boss, Hurton. Hurton administers a fishing operation and he presses Virdon and Burke into service as fishermen after they pass a test by swimming under a sheet of flames.