Old British TV show -- any ideas?

So when I was a kid in England, 77 to 85, I remember seeing a show. All I remember that they would grab random people, then they’d have to go across this “dot-maze” thing, if they screwed up, they’d be vaporized.

Any ideas what this was?

http://en.wikipedia.org/wiki/The_Adventure_Game ?

Gronda gronda!

That’s it!

Man, reading Wikipedia makes this sound like the nuttiest thing ever.

On Youtube, of course. Fantastic show.

They disintegrated Tegan!

I also enjoyed the part where the hostess mildly scolds the children.