Most TV shows are chock-full of entirely fictional characters, but they inspire real-life passion. "My So-Called Life" was canceled after one amazing season in 1995 and I'm still pretty ticked off about it. People were so obsessed with "Veronica Mars" that a Kickstarter campaign raised 6 million bucks to fund a movie, which premiered in March of 2014 [source: Harnick]. Fan theories arise from the same sort of fervor, often even long after a given TV show has gone off the air.
Many fan theories are complete and total conjecture, giving people a way to expand upon their favorite characters and plotlines without any real evidence or proof. However we do know that TV writers have been known to take a "more than meets the eye" approach to storytelling. Just ask the guys who created "Lost," which was peppered liberally with literary and obscure historical references designed to intricately weave subtle connections between characters and plotlines [source: Zemier]. So really, it's not all that far-fetched that some of these fan theories could have a hint (or a large helping) of truth to them. But don't take my word for it – read on and judge for yourself!