Benedict Cumberbatch

as Theo Rose

as Uncle Nubar

as Dad

as Self

as Self

as Benjamin

as Henry Sugar / Max Engelman / Harry (archive footage)

as Narrator

as Henry Sugar / Make-Up Artist

as Self (archive footage)

as AB

as Mr. Thomas (voice)

as Harry Pope

as The Grinch (voice)

as Daddy (voice)

as —

as Doctor Stephen Strange

as Self (archive footage)

as Self - Doctor Stephen Strange

as Louis Wain

as Phil Burbank

as Lt. Stuart Couch

as Doctor Strange

as —

as Self

as Stephen Strange / Doctor Strange (voice) (archive footage)

as Self

as Greville Wynne

as Self - Narrator

as Doctor Strange

as The Grinch (voice)

as The Grinch

as Colonel MacKenzie

as Benedict Cumberbatch

as Dominic Cummings

as Thomas Edison

as Grinch (voice)

as Doctor Strange

as Shere Khan (voice)

as Stephen Lewis

as Doctor Strange (archive footage)

as Grinch (voice)

as Narrator (voice)

as Doctor Strange

as Self - Performer

as Dr. Stephen Strange

as All

as Norman Lewis (voice)

as Sherlock Holmes

as Billy Bulger

as Hamlet

as Narrator (Voice)

as Classified (voice)

as Alan Turing

as Narrator

as Self

as Agent Classified (voice)

as Smaug / Sauron (voice)

as Smaug / Sauron

as John Harrison / Khan

as Rosencrantz

as Wallace

as Narrator (voice)

as Sherlock Holmes

as William Ford

as Julian Assange

as Little Charles Aiken

as Narrator

as Reader

as Necromancer

as Sherlock, Self

as Self / Frankenstein / The Monster

as Dante (voice)

as —

as The Creature / Victor Frankenstein

as Maj. Jamie Stewart

as David

as Peter Guillam

as James

as Henry Clark

as Negotiator

as Nick Kaufman

as Vincent Van Gogh

as Joseph Dalton Hooker

as Guy Burgess

as William Carey

as Paul Marshall

as Joe / Charlie

as Alexander Masters

as William Pitt

as Patrick Watts

as Narrator (voice)

as Stephen Hawking

as Royalist

as The Man

as Jeremy