Black Archive

The Black Archive was a secret vault maintained by UNIT. It functioned as a depository of everything that shouldn't exist on Earth but did anyway, and required a UNIT level one clearance to gain entrance.

It contained numerous spacecraft and the Tunguska Scroll which UNIT had recovered in 1972. The Brigadier smuggled Sarah Jane Smith into the archives to steal the scroll. (SJA: Enemy of the Bane)

The Doctor, during either his second or third incarnation, aided in the foundation of the Black Archive, and later sent Martha Jones there to fetch information on the Krynoid virus in the hopes that it might hold a key to stopping the Enochian invasion in Greenwich Park. (IDW: Don't Step on the Grass)