A former Solar guard Captain hijacks the Titan Mail Ship in revenge for his being dishonorably discharged from the Space Academy. Roy Cowan, the former "Ace of the Space Lanes" (see episode #8) returns, and this time he starts off by hijacking the Titan Mail Ship, leaving Captain Strong in dire jeopardy as revenge for his having been discharged from Space Academy. He then teams up with a weapons specialist who was also discharged from the Academy. They go on a devastating rampage, destroying other ships that they come across at random. The Polaris Crew offer themselves as bait to trap Cowan. Cowan comes after the bait with a vengeance.
