Jack Shephard returned to the island with a new role (a DHARMA janitor) and a new attitude (not trying to fix anything). But he still doesn't know what he's even doing there.
Elizabeth Mitchell as Juliet Burke on Lost. She's been a terrific actress since she was first introduced on the show, but her character has gotten better and better.
In season three of Lost, Eko goes up against the Smoke Monster. Some like to call it Smokey, or if you work for DHARMA, probably Cerberus. Whatever you call it, it'd only be believable on Lost.
