Knightmare Live

Step left. Go forward two paces. Welcome to Knightmare – must-see TV in the early 90s that left kids across the country desperate to don the Helmet of Justice and conquer the game's various fiendishly hard levels while dungeon master Treguard boomed warnings about their life force. This theatrical adaptation arrives at the Fringe on a nostalgic wave in the same month that a brand new episode has turned up on YouTube.

By rights, this shouldn't work at all. The notion of replicating an epic, multi-location cult fantasy TV series on stage is a bit ridiculous, the show's numerous set changes are clunky and intrusive and a last-minute plot twist just feels tacked on. But the whole thing is done with such a sense of fun and love for the original that it's hard not to get swept up in the rush.

As Treguard and the evil Lord Fear, Paul Flannery and Tom Bell send up the doom-laden atmosphere of the wench-filled original brilliantly, embracing the ludicrousness of it all. A different guest wears the helmet each day while other comics at the Fringe take the hot seat as their guides through the dungeon. It's scrappily joyous nonsense.

Nostalgia powers this production like a dynamo, keeping everything together even when the cracks are gaping. It's not high art—or even middle art—but it's bloody good fun.