I won't put too much here because I don't want to spoil surprises.
This was the best hour I spent in Blackpool and whilst the entry price might seem high there are usually vouchers and deals available (or you can get a Merlin membership from £10 a month which gives you unlimited entry to all of the Merlin attractions).
The actors here are great and keep you entertained all the way though, also the effects of the place keep you on your toes (nearly jumped out of my skin a few times). I gave my wife up to the torturer on account of her being from Yorkshire although sadly he did release her from her cage :-s
The highlight is the Dead Drop ride at the end, nothing special but by the time you get here you are already on edge and it makes a nice finishing touch.
Outside of the Pleasure Beach I would say this is the best attraction in Blackpool.More