I've finally managed to watch last weekend's episodes from challenge (alas, my job sucks, so I didn't watch then until yesterday)... and I have a question about the bomb room...

Is this particular room different physically from the rest of them? As in, the chromakey colour?

Last sunday, a team died in the bomb room (The girls?), an animation of the bomb blowing up played... during the explosion, the "blue screen" studio can be clearly seen, except it's white. When playing it back in frame-advance, a temporary white wall can be clearly seen where the door on the left is. After that, the whole image maxed out to white.

Any ideas?

Maybe I'm just being a little melodramatic, but it's made me wonder.... how come Challenge have only started showing episodes from Series 3? Does that mean that the tapes from series 1 and 2 have been deleted? If not, why haven't they showed them?