Jess Collins appears, recalling the death of her boyfriend Dave and the defeat of the Corvids by the Doctor and Clara. (COMIC: The Highgate Horror)
The Doctor has no memory of Clara Oswald. (TV: Hell Bent) He does, however, remember the events of the previous encounter with Jess. (COMIC: The Highgate Horror) Oddly, however, he seems to no longer even remember Clara's name, despite indicating in Hell Bent that he still remembered that he travelled with someone named Clara.