ST:DS9, Civil Defense, 307
This is a weird episode to have show up in the third season. Jake, O'Brien, and Sisko end up tripping a counter-rebellion mechanism left in place by the Cardassians. There are lots of problems with the notion (In three years they wouldn't have identified neurotoxin gases still in the ore processing facilities? There are still ore processing facilities? And why didn't they just purge the system computer and replace it with a Federation computer core? And wouldn't O'Brien have known better than to transfer an unknown, unnamed file into the main computer memory?)
Anyhow. A comedy of errors ensues as they take the absolute wrong steps to regain control of the station. And their fusion reactors do overload, and only the station shields are able to "contain" the energy.
But they contain it inside the station... and there's a fancy computer graphics scene with lightning shooting from the core of the station to the shields... somehow not frying everyone within...
Hmm.