Friend from the Future (TV story)

 was a short promo teaser broadcast during Match of the Day and later released online in 2016, which introduced the character of Bill Potts to the world. While this was made before the filming of The Pilot, which introduced Bill to the show proper, some elements were re-used and re-purposed for that episode.

Synopsis
The Daleks are following the Twelfth Doctor and Bill through a corridor. Will they get out alive?

Plot
The Twelfth Doctor and Bill Potts are running from Daleks. They hide behind a wall, and Bill repeatedly questions the Doctor as to what a Dalek is. He hurriedly explains to her. Then he receives a notification via the psychic paper and insists that they need to go back to the TARDIS, convinced that the future, specifically 2017, needs them. As they leave their hideout, a Dalek shoots at them and states that it detected humanoids.

As they turn around a text hits the screen that says "Introducing Pearl Mackie as Bill".

Cast

 * The Doctor - Peter Capaldi
 * Bill - Pearl Mackie
 * Voice of the Daleks - Nicholas Briggs

Crew

 * Writer - Steven Moffat
 * Director - Lawrence Gough
 * Designer - Michael Pickwoad
 * Costume designer - Hayley Nebauer
 * Producer - Peter Bennett
 * Executive producers - Steven Moffat, Brian Minchin

Species

 * Bill mentions the Daleks' standard weapons and their standard catchphrase.
 * The Doctor tells Bill what a Dalek is.

Science

 * The Doctor pulls out his psychic paper.