after two rounds. Ties are broken in favour of the contestant with the fewest total passes. If contestants have the same score and number of passes, a five-question tiebreaker is played. Each of the tied contestants answers the same set of questions individually, with the others exiting the studio so that they cannot hear the results. The contestant who gives the most correct answers is the winner. The winners advance to the next round, for which they must choose a different specialised subject. In the early years of the programme, finalists were allowed to reuse their first round subjects in the grand final. However, from 1992 onwards, the finalists are required to choose a third subject. The winner of the final of the BBC version is declared "Mastermind" for that year and is the only contestant to receive a prize, in the form of a cut glass engraved bowl. During Magnus Magnusson's tenure as presenter, the trophy was specially manufactured by Caithness Glass. A special guest would always be invited to present the trophy to the winner, with the exception of the final edition in 1997, in which Magnusson presented it himself. Every trophy used by the main series has been made by Scottish artist Denis Mann. Versions Mastermind (1972 to 1997) presented by Magnus Magnusson aired on television channel BBC1. It was originally broadcast late on a Sunday night and was not expected to receive a huge audience. In 1973 it was moved to a prime-time slot as an emergency replacement for a Leslie Phillips sitcom, Casanova '73, which had been moved to a later time following complaints about its risqué content. The quiz subsequently became one of the most-watched shows on British television. Magnusson's catchphrase "I've started so I'll finish" was also the title of his history of the show. The original series was filmed in academic or ecclesiastical buildings. The last programme of the original series was filmed at St Magnus Cathedral in Orkney. The original series spawned many specials: Supermind was an annual playoff between either the first four champions of Mastermind or champions of other TV quiz shows (including Mastermind) from 1976 or 1977. It ran for three years between 1976 and 1978. Cup Final Mastermind was an annual playoff between experts and supporters from the FA Cup Finalist teams they are supporting. It ran from 1978 and 1980. Mastermind International was an annual playoff