When ABC's drama “Lost” ends in May, it will definitively end - don't look for any sequels or spinoffs. The show's producers said Tuesday they've known the final image of the mythologically dense series about Oceanic Airlines Flight 815 since the first season, although Carlton Cuse said the last episode hasn't been written yet. It will air sometime in May. Cuse and Damon Lindelof were giving away few secrets to the show's rabid fans at a news conference Tuesday, even refraining to show video clips. They said the show's sixth and final season will hearken back to its first, and most popular, season in 2004. A one-hour recap special, an attempt to get uninitiated or casual viewers as familiar with the story as they can, will precede the opener. One secret producers did reveal: actress Cynthia Watros, who played the character Libby before being killed off in the second season, will return this year.