The 8 Most Surprising TV Crossovers of All Time, Ranked

Crossovers are usually designed to feel seamless, with characters slipping into each other's worlds or tones aligning just enough to make the whole thing feel like a natural extension of both shows. But the most memorable TV crossovers? They're often the ones that shouldn't work. The ones where genres clash, tones collide, and you're left wondering who thought this was a good idea (right up until it somehow becomes incredibly entertaining).