Although Doctor Who primarily concerns the adventures of the Doctor zipping through time and space in his quirky TARDIS — a box that allows travel through Time And Relative Dimension In Space — there are, in fact other forms of time travel within the canon of the Whoniverse. And oddly, some of the most paradoxical timey-wimey adventures in all of Doctor Who occur when the characters are not using the TARDIS. In the days of the 10th, 11th, and 12th Doctor, the most common alternative to the TARDIS was a wrist device known as a vortex manipulator, commonly described as “cheap and nasty time travel” and used by everyone from Captain Jack Harkness to Missy.
