The Magician's Apprentice (in-universe)

The Magician's Apprentice was the first episode of the ninth series of Doctor Who. It followed a New Series Prologue and was succeeded by The Witch's Familiar.

It featured the Doctor and Clara, as well as an individual resembling. Its synopsis mentioned "the skies of Earth". By 10 May 2020, the episode was available on BBC iPlayer along with the rest of series 9. (WC: The Zygon Isolation)

Important note
This is a in-universe counterpart of the real world Doctor Who television story The Magician's Apprentice that exists within the Doctor's universe. It was a visual meta-fictional cameo in The Zygon Isolation, where Petronella Osgood and her Zygon duplicate scroll through BBC iPlayer searching for something to watch.