Tonight's Northern Ireland match completes the 12 heats of the first round.
The winner moves on to join the other 11 semi-finalists, which leaves four places to be filled by the best runners-up.
The contenders are:
Edward Kennedy (retired naval rating): West Malaysia
Martin Bradley (mature student): The Films of Steve McQueen
James Nesbitt (civil servant): European History 1914-1945
Jane Morton (local government officer): France since 1814
