Knightmare (1987-1994) A team of three contestants have to guide a fourth contestant (who's vision is impaired by a helmet) through a dungeon on a quest. Usually their goal was to recover a special object such as a crown or sword but they were rarely successful. During their adventure the group would have to solve riddles, avoid traps, and would encounter a wide range of characters and monsters (including goblins, wizards, dragons, witches, jesters, ogres, maidens and potion sellers). Some of these would be very pantomime-esquire such as the charismatic Hordris, the immortal Lord Fear, and of course the captivating Tregar.
The dungeon is generated using painted backgrounds and the same blue screen technique used by weathermen (Chroma Key). Despite its innovative format and huge following it never quite got the attention or praise it deserved (probably because it was on ITV rather than BBC).
It was recently repeated on Challenge TV during the mornings. There are apparently no plans to start a new series.
For more information see: http://www.knightmare.com/