The Doctor and Peri arrive on Karfel, a planet ruled by fear where the enemies of its ruler, the despotic Borad, are banished into a time tunnel known as the Timelash.
| Actor | Role |
|---|---|
 Colin BakerThe Doctor | The Doctor |
 Nicola BryantPeri Brown | Peri Brown |
 Robert AshbyThe Borad | The Borad |
| DDenis CareyOld Man | Old Man |
 Paul DarrowTekker | Tekker |
 Eric DeaconMykros | Mykros |
 Neil HallettMaylin Renis | Maylin Renis |
 Jeananne CrowleyVena | Vena |
| DDavid AshtonKendron | Kendron |
| DDavid ChandlerH.G. Welles | H.G. Welles |
 Tracy-Louise WardKatz | Katz |
| PPeter Robert ScottBrunner | Brunner |
| DDicken AshworthSezon | Sezon |
 Steven MackintoshGazak | Gazak |
 Christine KavanaghAram | Aram |
| MMartin GowerTyheer / Bandrill Ambassador (voice) | Tyheer / Bandrill Ambassador (voice) |
| DDean HollingsworthAndroid | Android |
| JJames RichardsonGuardolier | Guardolier |