1. Tribbles. Check.
2. Planet-eating space amoeba
3. Planet full of hippies
4. Planet full of gangsters
5. Planet full of Nazis
6. Planet full of Romans
7. Apollo
8. Planet-eating killbot made of neutronium
9. Invaders from Andromeda
10. The evil parallel universe
11. A horny Vulcan
12. A pissed-off lizard-man