Doctor Who Arc of Infinity: Part Three (Season 20, Episode 3)
TV-PG
TV Episode | 25 min | Adventure, Drama, Family

Primary photo for Arc of Infinity: Part Three

Doctor Who

Arc of Infinity: Part Three (Season 20, Episode 3)

TV-PG

TV Episode | 25 min | Adventure, Drama, Family

Something seemed amiss about the Doctor's execution, so the Castellan has Commander Maxil discreetly but fully look it. Meanwhile, as the Doctor meets the anti-matter being inside the Time Lord Matrix, Tegan and her cousin's friend run ...See moreSomething seemed amiss about the Doctor's execution, so the Castellan has Commander Maxil discreetly but fully look it. Meanwhile, as the Doctor meets the anti-matter being inside the Time Lord Matrix, Tegan and her cousin's friend run afoul of a bird-like alien back on Earth. Written by statmanjeff See less

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Cast	+ Add Cast
18 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)
Leonard Sachs Lord President Borusa Lord President Borusa See fewer	Thunderball (1965)
Michael Gough Councillor Hedin Councillor Hedin See fewer	Batman Forever (1995)
Ian Collier Omega (voice) Omega (voice) See fewer	Doctor Who (1963)
Colin Baker Commander Maxil Commander Maxil See fewer	Doctor Who (1963)
Paul Jerricho The Castellan The Castellan See fewer	The Whistleblower (2010)
Neil Daglish Damon Damon See fewer	Doctor Who (1963)
Elspet Gray Chancellor Thalia Chancellor Thalia See fewer	Four Weddings and a Funeral (1994)
Max Harvey Cardinal Zorac Cardinal Zorac See fewer	Doctor Who (1963)
Andrew Boxer Robin Stuart Robin Stuart See fewer	Doctor Who (1963)
Alastair G. Cumming Colin Frazer (as Alastair Cumming) Colin Frazer (as Alastair Cumming) See fewer	Sensation (2021)
Malcolm Harvey The Ergon The Ergon See fewer	Doctor Who (1963)
Chris Andrews Guard (uncredited) Guard (uncredited) See fewer	Hi-de-Hi! (1980)
Glen Bexfield Guard (uncredited) Guard (uncredited) See fewer	Locked In (I) (2010)
Michael Gordon Browne Guard (uncredited) Guard (uncredited) See fewer
Terry Phillips Guard (uncredited) Guard (uncredited) See fewer