S1.E1 ∙ Episode #1.1

A long-running series in which members of the public sit in a black chair to answer questions on a specialist subject and general knowledge.

S1.E2 ∙ Episode #1.2

S1.E3 ∙ Episode #1.3

S1.E4 ∙ Episode #1.4

Featuring contenders from the west of Scotland.

S1.E5 ∙ Episode #1.5

Featuring contenders from the north east of England.

S1.E6 ∙ Episode #1.6

Featuring contenders from the London area.

S1.E7 ∙ Episode #1.7

Featuring contenders from the south east of England.

S1.E8 ∙ Episode #1.8

Featuring contenders from Wales.

S1.E9 ∙ Episode #1.9

Featuring contenders from the south west of England.

S1.E10 ∙ Episode #1.10

Featuring contenders from the Midlands.

S1.E11 ∙ Episode #1.11

Featuring contenders from the London area.

S1.E12 ∙ Semi-Final 1

The first of the semi-finals, featuring four of the 11 first-round winners.

S1.E13 ∙ Semi-Final 2

The second semi-final, featuring four of the 11 first-round winners.

S1.E14 ∙ Semi-Final 3

The third semi-final, featuring the remaining three of the 11 first-round winners.

S1.E15 ∙ The Final

The final, featuring the three victorious semi-finalists.

S2.E1 ∙ Episode #2.1

S2.E2 ∙ Episode #2.2

S2.E3 ∙ Episode #2.3

The contenders are quizzed on their specialist subjects of Greek mythology, words, classical music, and 19th century English literature, before facing the general knowledge round.

S2.E4 ∙ Episode #2.4

Four contenders answer questions on their specialist subjects harps, harp music and harpists; the life and works of Franz Liszt; European mountaineering to 1914; and the life and works of Rudyard Kipling.

S2.E5 ∙ Episode #2.5

The four contenders face specialist subjects Scottish geography, literature, opera, and railways of Britain in this first-round match.

S2.E6 ∙ Episode #2.6

The specialist subjects of the contenders are Frederick the Great, the history of music 1680-1850, Shakespeare's plays, and Romano-British archaeology.

S2.E7 ∙ Episode #2.7

Specialist subjects of modern weapons, the city of Paris, the history of the theatre, and painting 1880-1994 are chosen by the four contenders in the black chair.

S2.E8 ∙ Episode #2.8

S2.E9 ∙ Episode #2.9

The four contenders answer specialist subject questions on the Royal Navy, classical mythology, English literature, and symphony orchestras, then the general knowledge round.

S2.E10 ∙ Episode #2.10

British geography, Gilbert and Sullivan, the Third Reich, and the 19th century novel are the specialist subjects chosen by the contenders taking the black chair in this first-round contest.

S2.E11 ∙ Episode #2.11

S2.E12 ∙ Episode #2.12

In the last of the first-round matches, the contenders in the black chair answer questions on West Africa, 19th-20th century crime, the history of Greece and city states to the death of Alexander, and British birds.

S2.E13 ∙ Episode #2.13

The first-round winners from the East Midlands, Northern Ireland, the North East, and Wales compete for a place in the final.

S2.E14 ∙ Episode #2.14

The second semi-final sees regional winners from the South East, North West, and two from Scotland competing for a place in the final.

S2.E15 ∙ Episode #2.15

The two regional winners from London join the winners from the South West, and West Midlands to compete for a place in the final.

S2.E16 ∙ Episode #2.16

The four highest-scoring runners-up from the regional matches play for the remaining place in the final.

S2.E17 ∙ 1973 Final

S3.E1 ∙ Episode #3.1

S3.E17 ∙ 1974 Final

S4.E1 ∙ Episode #4.1

S5.E1 ∙ Episode #5.1

S6.E1 ∙ Episode #6.1

S7.E1 ∙ Episode #7.1

S8.E1 ∙ Episode #8.1

S8.E17 ∙ Final

Final to decide who will be crowned Mastermind Champion 1979. Specialist subjects include: Royal Navy History 1794-1805, the Career of Oliver Cromwell, and the History of Wales AD 400-1100.

S9.E1 ∙ Episode #9.1

S9.E9 ∙ Episode #9.9

S9.E15 ∙ Episode #9.15

S9.E17 ∙ 1980 Final

S10.E1 ∙ Episode #10.1

S10.E17 ∙ 1981 Final

S11.E1 ∙ Episode #11.1

Commencement of the contest to determine Mastermind Champion 1983. Specialised subjects are: Novels of Evelyn Waugh, Novels of the Bronte Sisters, Shakespeare's tragic heroes, Percussion playing from 1700.

S11.E17 ∙ 1983 Final

S12.E1 ∙ Episode #12.1

S13.E1 ∙ Episode #13.1

S14.E1 ∙ Episode #14.1

S15.E1 ∙ Episode #15.1

S15.E22 ∙ 1987 Final

S16.E1 ∙ Episode #16.1

S16.E4 ∙ Episode #16.4

S17.E1 ∙ Episode #17.1

S17.E23 ∙ 1989 Final

S18.E1 ∙ Episode #18.1

S18.E22 ∙ 1990 Final

S19.E1 ∙ Episode #19.1

S20.E1 ∙ Episode #20.1

S21.E1 ∙ Episode #21.1

S22.E1 ∙ Episode #22.1

S23.E1 ∙ Episode #23.1

S24.E1 ∙ Episode #24.1

S25.E1 ∙ Episode #25.1

S25.E22 ∙ Episode #25.22