28/31 Semi-final subjects include Jane Austen, Scottish Post-Punk Bands and Sibelius.
BBC Two Wales
BBC Two Northern Ireland
BBC Two England, Scotland only
27/31 Semi-final subjects include Black Books, Oskar Schindler and Richard Brindsley Sheridan.
BBC Two except Northern Ireland
26/31 Semi-final subjects include Sean Connery, world heavyweight boxing and Butch Cassidy.
BBC Two except Wales
25/31 Subjects include Glamorgan County Cricket Club, the Dark Ages in Britain and Thomas Paine.