"Let It Be"
From Tardis Wiki, the free Doctor Who reference
"Let It Be" was a song by the Beatles.
Polly Wright found a CD recording of the song in Carfrae Morgan's rucksack and showed it to Ben Jackson. (PROSE: Invasion of the Cat-People)
The Eighth Doctor complimented Fitz Kreiner's rendition of it on the piano. (PROSE: Eater of Wasps)
