Yep. Thought it was the best thing ever at the time. That and Space 1999. Both are pretty terrible when you watch them again.
Was a sort of Crystal Maze, except good. Well, at the time... The invisible beast on the Vortex was pretty lame if I remember rightly. Even at the time it seemed too lucky to win.
Wasn't it also exactly the same every damn week? Was basically like Power Rangers, except the monster didn't become huge, and there were no cute birds with a nice set.
Was quite good though how each week people could be left behind to rot (or be blown up, can't remember) on the planet. Nice happy ending there for the kiddies.
Cheers
I am 99% probably lying in bed right now... so don't blame me for crappy typing