Doctor Who Mawdryn Undead: Part Four (Season 20, Episode 12)
TV-PG
TV Episode | 25 min | Adventure, Drama, Family

Primary photo for Mawdryn Undead: Part Four

Doctor Who

Mawdryn Undead: Part Four (Season 20, Episode 12)

TV-PG

TV Episode | 25 min | Adventure, Drama, Family

Mawdryn presents the Doctor with an ultimatum; give up his remaining regenerations or leave the ship and suffer the consequences. Meanwhile Turlough's stupidity puts the two Brigadiers at risk of meeting, angering the Black Guardian.

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Cast	+ Add Cast
13 cast members

Name	Known for
Peter Davison The Doctor The Doctor See fewer	Doctor Who (1963)
Sarah Sutton Nyssa Nyssa See fewer	Doctor Who (1963)
Janet Fielding Tegan Tegan See fewer	Doctor Who (1963)
David Collings Mawdryn Mawdryn See fewer	Scrooge (1970)
Nicholas Courtney The Brigadier The Brigadier See fewer	Doctor Who (1963)
Valentine Dyall Black Guardian Black Guardian See fewer	The Haunting (1963)
Mark Strickson Turlough Turlough See fewer	Doctor Who (1963)
Roger Hammond Doctor Runciman Doctor Runciman See fewer	The King's Speech (2010)
Peter Walmsley 1st Mutant 1st Mutant See fewer	Othello (1981)
Brian Darnley 2nd Mutant 2nd Mutant See fewer	Doctor Who (1963)
Lucy Benjamin Young Nyssa (uncredited) Young Nyssa (uncredited) See fewer	Press Gang (1989)
Michael Leader Mutant (uncredited) Mutant (uncredited) See fewer	EastEnders (1985)
Sian Pattenden Young Tegan (uncredited) Young Tegan (uncredited) See fewer	Beau Geste (1982)