Gryben

Gryben was a planet on which Robert Knox bought a TARDIS from a Nekkistani. (BFA: Medicinal Purposes)

It is a temporal enclave where all unauthorised time capsules travelling within the time vortex are diverted to, in order to be catalogue and questioned into why there are in the vortex. According to Coordinator Narvin a lot of the cases are due to aliens, either saying they are political prisoners, or that their planet is on the point of collapsing.

The inhabitants group themselves to which species they are. In the human outpost, Nepenthe, a free time agent lived. (BFG:Weapon Of Choice