Captured by Steve Zodiac after stealing some top secret documents, the spy Deblis is sentenced to 20 years imprisonment on the prison planet Conva. Flying there, Fireball and its crew are captured ...

3. The Doomed Planet - When a flying saucer leads the crew of Fireball XL-5 to Membrono - a planet doomed to be destroyed by another planet which ahs come out of its orbit - Steve Zodiac and ...