In a parallel universe, a version of Strax travelled in "The Mystery Time Machine" with alternate versions of the Doctor, Vastra, Jenny Flint, and K9. (NOTVALID: The Daft Dimension 489)
Behind the scenes
This version of Strax and his fellow companions are parody versions of the characters from Scooby Doo, with Strax taking on the role of Velma Dinkley.