A fellow called Blinovitch
Among several claims, Doctor says that Courtney will marry a man called Blinovitch - a surname famous in Doctor Who trivia. The Blinovitch Limitation Effect was a problem first cited by the Third Doctor, when Jo Grant asked why - as time travellers - they couldn’t just pop back in time and “have another go” at sorting a situation out. According to the Fifth Doctor, if two versions of the same person met, they’d “short the time differential” or go “zap” - and that is the Blinovitch Limitation Effect. However there have been several notable occasions in which two versions of the same person (the Doctor especially!) have come into contact with each other. Perhaps Mr Blinovitch needs to go back to the drawing board…
Talking ‘bout regeneration
When Lundvik pulls a gun on the Doctor, he tells her that she’ll be shooting him for a long time because he may “keep on regenerating forever”. Until The Time of the Doctor it was an accepted fact that Time Lords had thirteen lives, with twelve regenerations between them. However, with the Doctor at the end of his life-cycle, the Time Lords granted him the power to regenerate an unprecedented thirteenth time - indeed, they gifted him a “whole new regeneration cycle”. But now, he seems unsure. Could the Doctor in fact, live forever?