Gilbert and Sullivan
From Tardis Wiki, the free Doctor Who reference
Gilbert and Sullivan were best known for the fourteen operas they worked on together. The Doctor claimed that they once gave him a coat, which he in turn lent to Ian Chesterton. (DW: The Edge of Destruction)
Behind the Scenes
The Sixth Doctor and Evelyn Smythe once sang parodies of Gilbert and Sullivan's songs from The Mikado, HMS Pinafore and The Pirates of Penzance. (BFA: Doctor Who and the Pirates)