Lapsang souchong
From Tardis Wiki, the free Doctor Who reference
Lapsang souchong was a black tea that the Seventh Doctor favoured. Beltempest thought that it smelled like tar, but tried some anyway and enjoyed it. (PROSE: Original Sin)
The Second Doctor liked it, comparing it favourably to Assam. (PROSE: Downtime)
General Jafrid drank it while travelling to Barclow. (PROSE: The Well-Mannered War)
Lapsang souchong was one of the many types of tea that Dr Jeremiah O'Kane left to Dr Colin Dove when he retired as director of Hawthorne. (HOMEVID: The Zero Imperative)