A convicted murderer volunteers for an exchange program between Earth and Chromo.
"In dreams, some of us trope the stars":
- Poor Communication Kills: If the Chromoites had just asked for help with their famine instead of resorting to an elaborate conspiracy, they could have spared everyone a lot of trouble. Lampshaded in the episode's last line: when the aliens finally explain their true intentions, Kellander simply replies, "You should have asked".
- Teleportation: The Chromoites have invented a "Teleportation Agency" that they use to send one of their people to Earth—and vice versa.
- What Happened to the Mouse?: During the climactic struggle, an unconscious (or dead) human security guard is accidentally teleported to Chromo. We never learn what happens to him after that, and the characters don't even seem to notice he's missing.