“Lost” has found a new timeslot. ABC will debut the fourth season of the island drama on Thursday, Jan. 31 at 9 p.m., in place of “Grey’s Anatomy.” “Lost”, which aired on Wednesday nights at 10 p.m. last season, has eight episodes ready. “Eli Stone”, a new series from Greg Belanti (“Brothers and Sisters”) will follow “Lost” at 10 p.m.