Ascension of the Cybermen (in-universe)

An episode of Doctor Who was recommended to Petronella Osgood under "More episodes" when she watched The Zygon Invasion on BBC iPlayer on 10 May 2020. (WC: The Zygon Isolation)

Behind the scenes
Although it was unnamed in WC: The Zygon Isolation, it was named "Ascension of the Cybermen" in the real world.