Random Fiver Option?

[Sa'ar Chasm]

No groan for my fiendishly brilliant chemistry/B5 crossover joke? Alas.

That wasn't chemistry, that was physics. Well, OK, electrochemistry, but the one or two labs I did on it were more concerned with cell potential than current.

I did get it, though (for once). I was too impressed by all the levels (most of which have already been explored elsewhere, but never mind) to throw things at you.