The Day of the Doctor (in-universe episode)

The Day of the Doctor was an episode of Doctor Who released in 2013 in 3D. (TV: The Doctor Appears) By 10th of May, 2020, the episode was available on BBC iPlayer. (WC: The Zygon Isolation)

Important note
This is a in-universe counterpart of the real world Doctor Who television story The Day of the Doctor that exists within the Doctor's universe.