Twice Upon a Time is an episode of the British science fiction
television series Doctor Who, written by Steven Moffat, directed by
Rachel Talalay, and was broadcast as the thirteenth Christmas special
on 25 December 2017 on BBC One. It features the final regular
appearance of Peter Capaldi as the Twelfth Doctor, the first official
appearance of Jodie Whittaker as the Thirteenth Doctor, and
guest-stars David Bradley as the First Doctor, having previously
portrayed original First Doctor actor William Hartnell in the 2013
docudrama An Adventure in Space and Time. Pearl Mackie guest stars as
the Twelfth Doctor's former companion Bill Potts, while his other
companions make guest appearances â€" Jenna Coleman as Clara Oswald
and Matt Lucas as Nardole.This episode is a continuation of events
after "The Doctor Falls", addressing the cliffhanger that it ended on,
and takes place during the final story of the First Doctor; footage
from the 1966 serial The Tenth Planet, is used in the special. "Twice
Upon a Time" is Capaldi's fourth and final Christmas special as the
Twelfth Doctor, and the last Doctor Who story to be written and
produced by Moffat, who had served as the show's executive producer
and chief writer since taking over from Russell T Davies in 2010.
After the special's broadcast, Moffat was succeeded as executive
producer and showrunner by Chris Chibnall. It is also the last episode
to have music composed by Murray Gold, who had composed music since
the series' revival in 2005 and is succeeded by Segun Akinola in
Series 11. The special has received generally positive reviews from
critics.Wandering back to his TARDIS through the South Pole in 1986
after leaving his companions behind, the First Doctor refuses to
regenerate. He encounters the Twelfth Doctor outside his own TARDIS in
a similar state of mind. The pair are soon approached by a confused
and injured First World War British captain, displaced from December
1914 while in a gun-point stalemate with a German soldier. All three
are then forcibly taken into a large spaceship. Inside, they meet with
Bill; the Twelfth Doctor, however, doubts she is the real Bill. Upon
encountering the ship's glass-like holographic pilot, they are offered
freedom in exchange for allowing the ship to return the Captain to the
moment of his death. Refusing to allow the Captain to die, they escape
and take the First Doctor's TARDIS to the planet Villengard in the far
future.Alone, the Twelfth Doctor meets with the rogue Dalek Rusty, who
has taken refuge from other Daleks hunting it. Given access to the
Dalek Hivemind, the Doctor learns that the pilot and its ship, known
as Testimony, were created on New Earth, designed to extract people
from their timelines at the moment of their death, and archive their
memories into glass avatars. "Bill" is one such avatar, created from
her memories. Seeing no evil to fight, the Doctors agree to return the
Captain to his timeline. Upon arrival, the Captain asks the Doctors to
keep an eye on his family, introducing himself as Archibald Hamish
Lethbridge-Stewart, implying that he is the ancestor of the Doctor's
frequent ally and lifelong friend the Brigadier. As time resumes, the
Doctors watch as soldiers on both sides begin singing "Silent Night".
The Twelfth Doctor explains to the First that he deliberately shifted
the Captain's timeline to the start of the Christmas truce, to ensure
his life would be spared. Twice Upon a Time (Doctor Who) Biography, NetWorth, Height, Age, Weight, Family, Married, Son, Daughter