Unearthing: a bad idea regardless

There was an episode of Buffy in which Cordelia, responding to a report that archaeologists had unearthed something that was proving quite deadly, said: "Some things should remain earthed!"

I'm watching a Doctor Who Confidential, on the episode The Water of Mars; they've got water all over the set and one of the electricians is pointing out how dangerous that is for shooting. "So, everything has to be 12 volt. All the lights, all the monitors, all the buttons, etc., all have to be earthed, so that no one dies."

I guess Cordelia was right!

(for those who don't know: the American for what you do with electrical stuff is "ground")