Last updated 24 March 2024


Part Four

Series Episode Number: 612

World Premiere: Fri 3 Feb 1984 - 6:41pm GMT [BBC One] (United Kingdom)
First Broadcast: Thu 14 May 2015 - 8:30pm EDT [Retro TV]
Running Time: 24 minutes 26 seconds

5.60 Million (UK)

Appreciation Index: 65 (UK)

Chart Position: 112 () (UK)




The Doctor manipulates the Gravis into restoring the TARDIS. But he must find a way to break the Tractators' hold over Frontios before they wipe out all life on the surface.


Characters hide uncredited
The DoctorPeter Davison
TeganJanet Fielding
TurloughMark Strickson
BrazenPeter Gilmore
NornaLesley Dunlop
RangeWilliam Lucas
GravisJohn Gillett
PlantagenetJeff Rawle
CockerillMaurice O'Connell
RetrogradeRaymond Murtagh
TractatorGeorge Campbell
TractatorMichael Malcolm
TractatorStephen Speed
TractatorWilliam Bowen
TractatorHedi Khursandi
Captain RevereJohn Beardmore (uncredited)
ColonistCaroline Hatch (uncredited)
ColonistFernando Monast (uncredited)
ColonistJudith Jeffery (uncredited)
ColonistLaurie Goode (uncredited)
ColonistMonica Ramone (uncredited)
ColonistPenny Rigden (uncredited)
ColonistPeter Gates Fleming (uncredited)
ColonistRobert Goodman (uncredited)
ColonistRobert Peters (uncredited)
ColonistTerry Bradford (uncredited)
Fighting RetrogradeSteve Emerson (uncredited)
OrderlyBarry McKenna (uncredited)
OrderlyChris Holmes (uncredited)
OrderlyDaniel D'Arcy (uncredited)
OrderlyIan Marshall (uncredited)
OrderlyJohn Greening (uncredited)
OrderlyJohn Hamilton Russell (uncredited)
OrderlyKeith Norrish (uncredited)
OrderlyMiles Ross (uncredited)
RetrogradeAnthony Freeman (uncredited)
RetrogradeJames Lyon (uncredited)
RetrogradeMike Mulloy (uncredited)
RetrogradePeter Creasey (uncredited)
RetrogradeTerence Brook (uncredited)