- Dee Dee, Marky and Joey
- Yellow Aliens (antagonist)
- Yellow Alien Leader (antagonist)
- Space Dog (semi-antagonist)
- Bob the Dog (semi-antagonist)
- The roaches did not play the main antagonist in this episode.
- Getting Crap Past The Radar: The Cockroaches enters a Gnome where a door is located in the crotch area.