… you see an oil puddle under a leaking car, and your first thought is “PIPER MARU.”

Yeah, my mind went right to the classic episode, and not even to the (quite decent) feature film that also employed the black oil as a central plot device.  Because a possessed Alex Krycek is somehow even a cooler and creepier story element than a world-ending viral vehicle.

Coincidentally enough, my pal Pete tells me that today is the 21st anniversary of the first episode.