Sam and Dean Winchester are shocked when they run (literally) into the Doctor and Rose Tyler on a no name back road in South Dakota. But when the TARDIS takes off on it's own to 221B Baker Street Sherlock Holmes and John Watson are even more surprised. The unlikely allies now have to fend off aliens, demons, angels, and the apocalypse which again hangs over the Winchesters heads. In this SuperWhoLock fanfic the hunt though space is on.