5. XL5 To H2O - Sent to give aid to two survivors of a planet who are being attacked by a fish man, the crew of Fireball XL5 arrive to find the glass city of the planet destroyed and that the ...

The crew of Fireball XL5 find fuel tanker EF24 floating in space with its crew in a trance. They take the tanker back to Earth and escort the next one, EF25.