Mackie will play Bill. A clip was released which you can watch below to gives us a look at what we can expect from the new companion.
Alas we still have a wait yet for Doctor Who to return, as the show does not return to our screens till 2017 and shooting has not even started yet. Filming is due to begin in the coming weeks for Steven Moffat's final series.
— Doctor Who Official (@bbcdoctorwho) April 23, 2016
