* 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 Creator/DanielKaluuya (Mac) is 22, so the casting isn't too far out, while Creator/IainDeCaestecker (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 Franchise/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''.