Alien Life-Forms
- 1004 Life Takes Hold
- 1003 Life in the Skies
- 1001 Floating Life-forms
- 0928 Hostile world Levelled
- 0927 Alien geothermal life forms
- 0926 Alien bacterial mats
- 0736 Gnarled World
- 0727 The Long Flight
- 0639 Sand Bug
- 0635 Enchanted world
- 0614 Exobiopods
- 0517 Gas Bags!
- 0516 Floating Gas Bags
- 0316 Binary star and ringed plan
- 0305 The Great Migration