Why were fans so divided about the Lost finale? Mario Perez / Disney General Entertainment Content/Getty Naveen Andrews, Maggie Grace, Yunjin Kim, Dominic Monaghan, and Emilie De Ravin on 'Lost'.

Ultimately, the episodes that become the very best upon rewatching Lost are the pilot episodes, "Pilot: Part 1" and "Pilot: ...

Could ABC's Lost and HBO's The Leftovers actually be taking place inside the same universe? TV theorists certainly think so.

Few TV finales have sparked as much debate as Lost ’s. Appropriately titled "The End," the final episode aired on May 23, 2010, and left fans sharply divided over its ambiguity.