Forty-eight contenders started in January and tonight four are in at the 'finish' of the 1983 series. Middle Temple Hall in London is the setting for the final as two men and two women do battle for the title of Mastermind 1983.

The winner will receive the engraved Caithness Glass trophy from the Chairman of the BBC, George Howard, and an invitation to represent the United Kingdom in Mastermind International later this year.

Contestants:

Christopher Hughes (London underground train driver): British steam locomotives 1900-68

Margaret Peat (school science technician): Life of Richard III

Kathryn Tyson (civil servant): Shakespeare's tragic heroes

Alex Yates (charity worker): Slavery and the slave trade