Once, Upon Time

297c – "Once, Upon Time"
297c – "Once, Upon Time"
Doctor Who episode
Cast
	Doctor Jodie Whittaker – Thirteenth Doctor;
	Companions Mandip Gill – Yasmin Khan; John Bishop – Dan Lewis;
	Others Thaddea Graham – Bel; Rochenda Sandall – Azure; Sam Spruell – Swarm; Jacob Anderson – Vinder; Nadia Albina – Diane; Jo Martin – Fugitive Doctor; Steve Oram – Joseph Williamson; Craig Parkinson – Grand Serpent; Bhavnisha Parmar – Sonya Khan; Matthew Needham – Old Swarm; Craige Els – Karvanista; Barbara Flynn – Awsok; Jonny Mathers – Passenger; Chantelle Pierre – Police Officer; Nicholas Briggs – Voice of the Cybermen; Amanda Drew – Voice of the Mouri; Nigel Lambert – Priest Triangle;
Production
Directed by	Azhur Saleem
Written by	Chris Chibnall
Script editor	Caroline Buckley; Rebecca Roughan;
Produced by	Pete Levy
Executive producer(s)	Chris Chibnall; Matt Strevens; Nikki Wilson;
Music by	Segun Akinola
Series	Series 13
Running time	3rd of 6-part story, 49 minutes
First broadcast	14 November 2021
Chronology
← Preceded by; "War of the Sontarans"	Followed by →; "Village of the Angels"
	List of episodes (2005–present)

"Once, Upon Time", prefixed frequently with either "Chapter Three" or "Flux", is the third episode of the thirteenth series of the British science fiction television programme Doctor Who, and of the six-episode serial known collectively as Doctor Who: Flux. It was first broadcast on BBC One on 14 November 2021. It was written by showrunner and executive producer Chris Chibnall, and directed by Azhur Saleem.

The episode stars Jodie Whittaker as the Thirteenth Doctor, alongside Mandip Gill and John Bishop as her companions, Yasmin Khan and Dan Lewis, respectively.