Semi-final 1, 2026

Russell Davies chairs the nationwide general knowledge quiz that has been entertaining and challenging audiences since 1953. Four competitors test their wits against a vast array of questions, covering everything from Ariana Grande to Ariadne, and from baryons to baritones, seeking to become 'Brain of Britain 2026'.

Spotlights rounds are: Fighting video games, Billy Wilder films, Nuremberg Trials and Emmy Noether.

Presenter: Russell Davies Voiceover: Jess Lambert Casting Producer: Sunil Mistry Assistant Producer: Ami Gill Production Coordinator: Kate Scarbrough Producer: David Bodycombe Executive Producers: Justin Scroggie and Jago Lee A TellTale Industries/Format People production for BBC Radio 4.