In addition to the 2½ hour finale on Sunday, there are a couple other programs of note.
Prior to the finale, there's "
Lost: The Final Journey", a two hour cast retrospective from 7:00p - 9:00p.
Then after the finale and news, there's a special version of
Jimmy Kimmel Live entitled "Aloha to Lost" starting at Midnight. It'll feature appearances from executive producers Damon Lindelof and Carlton Cuse with "alternate endings"

of the show.