The Doctor and his new companion Clara are set to return to our screens at 6:15pm on Saturday 30 March.
The Bells of Saint John, the sixth episode in the seventh series of Doctor Who, will see the Doctor travel to modern day London for an urban James Bond-style thriller.
As the Doctor searches for Clara something dangerous in the city's WiFi is "picking off minds and imprisoning them." And as Clara becomes a target the Doctor steps in to save her and the rest of humanity.
The Bells of Saint John is written by Steven Moffat and guest stars Celia Imrie as an icy villainess.
Watch a trailer or read our preview of the brand new episode.
Doctor Who: The Bells of Saint John will air at 6:15pm on 30 March on BBC1.