Pages with tag Mondas Peter Capaldi et al appears on Canadian Television The Doctor himself joins InnerSpace's Teddy, Morgan and Ajay alongside Steven Moffat, Brian Minchin and new companion, Pearl Mackie! Series 10 (2017) trailers - the gateway to everything you've been waiting for, or something like that Doctor Who Season 10 starts April 15, 2017, featuring the introduction of a new companion, Bill, and a continuing relationship with Nardol. We know that in the Christmas Special the Doctor regenerates, and indeed trailer#2 shows what looks like the beginning of a regeneration.