The Mystery Time Machine

In a parallel universe, a version of the Doctor travelled in "The Mystery Time Machine" with alternate versions of Strax, Vastra, Jenny Flint and K9.

It closely resembled the N-Space Doctor's TARDIS. (NOTVALID: The Daft Dimension 489)

Behind the scenes
The Mystery Time Machine is a parody of the Mystery Machine, the van owned by the characters of the Scooby-Doo franchise.