Last updated 09 January 2020

Part One

Part One

Series Episode Number: 588

World Premiere: Tue 1 Feb 1983 - 6:50pm GMT [BBC One] (United Kingdom)
First Broadcast: Mon 3 Dec 1984 - 11:00pm CST [WTTW 11 Chicago]
Running Time: 24 minutes 3 seconds

6.50 Million (UK)

Appreciation Index: 67 (UK)

Chart Position: 103 () (UK)

Caught in a warp ellipse, the TARDIS is drawn to a huge spacecraft orbiting Earth whereupon the Doctor is separated in space and time from Nyssa and Tegan.

Characters hide uncredited
The DoctorPeter Davison
TeganJanet Fielding
NyssaSarah Sutton
The BrigadierNicholas Courtney
Black GuardianValentine Dyall
TurloughMark Strickson
HeadmasterAngus MacKay
IbbotsonStephen Garlick
Doctor RuncimanRoger Hammond
MatronSheila Gill
Stunt Double for TurloughNick Gillard (uncredited)
Stunt Double for Ibbotson Paul Heasman (uncredited)
Van DriverMark McBride (uncredited)Info
Police ConstableRobert Smythe (uncredited)
Police SergeantJohn Cannon (uncredited)
Middle Aged LadyJudy Roger (uncredited)
Middle Aged ManDennis Jennings (uncredited)
Farm LabourerBill Felton (uncredited)
Farm LabourerBill Hughes (uncredited)
SchoolboyPaul Ryan (uncredited)
SchoolboyJohn Hamilton Russell (uncredited)
SchoolboyMiles Ross (uncredited)
SchoolboyAdam Ros (uncredited)
SchoolboyColin Peck (uncredited)
SchoolboyGlen Paul (uncredited)
SchoolboyPaul Lawrence (uncredited)
SchoolboyPiers Keating (uncredited)
SchoolboyColin Forsyth (uncredited)
SchoolboyRussell Brook (uncredited)
SchoolboyChris Bradshaw (uncredited)
Schoolboy (1983)David Cole (uncredited)
SchoolboyWayne Norman (uncredited)
SchoolmasterMark Allington (uncredited)
SchoolmasterLes Conrad (uncredited)