AU: Castiel pays a visit to the Doctor just after the Ponds departure (a sequel to this)
└ “You’re full of grief, vexation and guilt. The guilt has sunk so deep into your soul that you started to live on it as if it was the only emotion left in you. And you started to believe in it and you started to loathe yourself. You’re not the same man, Doctor. That man, the man I knew— he’s gone.”
AU: unexpected visit
└ when the Doctor gives up after losing the Ponds, the old friend appears in the TARDIS to convince him there are still things worth living for
SuperWho AU - Appearances Can Be Deceptive
└ Gabriel tries to warn the Winchester’s about the Doctor.

AU - The Devil You Know
└ The Doctor lands in 2014 where Lucifer has taken control of his vessel but has he already met the Devil? Or is Lucifer just playing the Time Lord?
AU: the beginning
└ chasing a mysterious man, who happens to appear everywhere throughout the history, Winchesters knock to Ponds’ doors, not knowing that they’re actually the man’s companions
negotiateslikeaproperpsychopath:
you guys. crowley owns the moon. AND I THINK I KNOW HOW HE DID IT:
Superwho AU - Purgatory wasn’t really on the Ponds’ top ten destinations list.
└ After Dean is sent to Purgatory Sam calls on an old friend to help get him out.
Superwho AU - Dean is sent back to 1944 by a Weeping Angel and while he’s trying to find a way how to contact Sam and the Doctor, he runs into another Angel that starts to follow him everywhere. No matter where he goes, it’s always there as well, not doing anything, just covering its face. Until one day Dean decides to get things straight with his silent follower.
AU - The Doctor, The Clone & The Winchester
└ ‘Perplexed’ is only a polite term for ‘WTF’.