In 2016 , Capaldi reprised his role as the Twelfth Doctor in the Doctor Who spin - off programme , Class , written by young - adult author , Patrick Ness .
Head entity: twelfth doctor Q14460218 9 10
Tail entity: the doctor Q34358 12 13
Relation (head \u2192 tail): P527
Inverse relation (tail \u2192 head): P361