The Tempest

The Tempest was a play by William Shakespeare. Adrian wanted to discuss it with Clara Oswald in preparation for their teaching of it to Coal Hill School pupils. (TV: The Caretaker)

The Doctor quoted Prospero, saying "the stuff that dreams are made on," to Todd, while outside of Panna's cave. (TV: Kinda)

Behind the scenes
The title of AUDIO: Full Fathom Five is a reference to the line "Full fathom five thy father lies" from The Tempest Act 1, Scene 2.