The future. Criminals serve prison sentences before they commit their crimes. Prisons are on new planets that are being colonised. After serving their time, the former prisoners return to their home planet.
| Actor | Role |
|---|---|
 Edward JuddNick Crandall | Nick Crandall |
 Mike PrattOtto Henck | Otto Henck |
| WWendy GiffordPolly | Polly |
 Dyson LovellHenson | Henson |
 Jerome WillisRyman | Ryman |
 Judy ParfittMarie | Marie |
| MMichael Danvers-WalkerDan | Dan |
 Peter MaddenThe Examiner | The Examiner |
| PPeter StephensStephenson | Stephenson |
| KKen ParryBallaskia | Ballaskia |
 Oliver MacGreevyChief Guard | Chief Guard |
 Philip VossPolice Officer | Police Officer |
| MMichael HardingNewsreader | Newsreader |