Episode 4

Series Episode Number: 134

World Premiere: Sat 29 Oct 1966 - 5:50pm GMT [BBC One] (United Kingdom)
Running Time: 24 minutes 2 seconds

Appreciation Index: 47 (UK)

Chart Position: 48 () (UK)

Recorded on Sat 08 Oct 1966 in Riverside 1
Archive State: Missing

The Cybermen invade the Snowcap base, killing General Cutler, but they are then defeated. Back in the TARDIS, the worn out Doctor regenerates

Characters include uncredited
Dr. Who		William Hartnell
Polly		Anneke Wills
Ben		Michael Craze
General Cutler		Robert Beatty
Barclay		David Dodimead
Radar Technician		Christopher Durham
Terry Cutler		Callen Angelo
Radar Technician		Christopher Matthews
Dyson		Dudley Jones
Cyberman (Krang)		Harry Brooks
Cyberman (Jarl)		Reg Whitehead
Cyberman (Gern)		Gregg Palmor
Wigner		Steve Plytas
Geneva Technician		Eileen Cullen
Cyberman Voice		Peter Hawkins
Cyberman Voice		Roy Skelton

Production Team hide uncredited
Writer		Kit Pedler
Writer		Gerry Davis
Director		Derek Martinus
Producer		Innes Lloyd
Designer		Peter Kindred
Story Editor		Gerry Davis
Sound		Adrian Bishop-Lagget
Lighting		Howard King
Make-up		Gillian James
Costumes		Sandra Reid
Title Music		Ron Grainer
Title Music		BBC Radiophone Workshop
Assistant Floor Manager		Jenny McArthur (uncredited)
Production Assistant		Edwina Verner (uncredited)
Vision Mixer		Shirley Coward (uncredited)
Special Sound		Brian Hodgson (uncredited)
Title Music Arranger		Delia Derbyshire (uncredited)
Title Sequence		Bernard Lodge (uncredited)