People seem to die under his leadership if they don't follow his orders, but while trying to expose his evil actions something underneath the surface is slowly gaining activating, and a horrible fate lies in store for friend and foe alike.
- Ambiguous Robots: The Krotons are actually a species of mineral beings that can mimic other species, and they've fashioned themselves after specific human robots.
- Bad Boss: Commander Cobden.
- Call-Back: The colony ships are escaping Earth's solar flares, and the Doctor references the Ark.
- Of course, several are made to The Krotons.
- While coming out of a coma, Charley laments the fate of C'Rizz.
- Computer Voice: The Colonial Security Machine, but it's more like an automated answering system.
- I Can't Hear You: The Doctor and Charley end up near a mining apparatus and obviously, can't hear each other.
- Death by Materialism / Hoist by His Own Petard: Commander Cobden.
- Half-Human Hybrid: Inadvertedly, one of the colonials gets merged with a Kroton.
- Human Resources: The Krotons wish to use the humans in the colonial ships' brainwaves to revitalize their own kind.
- I Will Only Slow You Down: Gillespie urges Charley to leave him behind.
- Make It Look Like an Accident: The Doctor, Charley and a couple of troublemakers end up in an "Unfortunate cave-in".
- Neural Implanting: The "sleeper" people on the colony ships receive these.0
- The Professor: Professor Woodruff.
- Return Of The Sequel
- Rise to the Challenge: The K7 inside the Kroton ship starts pouring into the room where Charley finds herself in, forcing her and some colonials to climb up.
- Subliminal Seduction: The headsets seem to induce this.
- Take a Third Option: Let everybody suffocate? Or let them be absorbed by the Krotons? The Doctor goes with this instead.
