Published in Bullet #137, 09/23/1978.
Fireball received a message to "be at Baffin Bay on Saturday, September 9th at noon" and gives the lat/long of the exact location. Intrigued, Fireball snow skis to the spot. He is surprised to be greeting by a ice-breaking surfacing submarine. He finds the regular crew unconscious and the vessel under the command of Tawn who has plans for the nuclear powered boat.