* DawsonCasting: Paul, his twin sister Anna, Mac and Jay are A-level students, so probably aged somewhere around 17 (Mac turns 18 in episode 3). Lily Loveless (Anna) is 21 and Daniel Kaluuya (Mac) is 22, so the casting isn't too far out, while Iain de Caestecker (Paul) is 24. Sophie Wu (Jay) is 28. Thank goodness...
* RetroactiveRecognition: Iain de Caestecker is now probably better known (especially outside the UK) for playing Agent Fitz in the MarvelCinematicUniverse TV series ''Series/AgentsOfSHIELD'' and, to a lesser (and [[{{Squick}} Squickier]]) extent, Ocky in ''{{Literature/Filth}}''.
** Mat Fraser, who appears in a minor role as the owner of a corner shop near the main characters' school, is now much more well-known thanks to his recurring role as "Paul the Illustrated Seal Boy" in ''AmericanHorrorStoryFreakShow''.