ABC expands 'Lost' finale by extra half-hour: When the "Lost" finale airs on Sunday, May 23rd, the episode will run from 9 to 11:30 p.m. The overrun will air instead of the local news, with the "Jimmy Kimmel Live: Aloha to Lost" post-finale special remaining at 11:30 p.m. ABC is expected to announce the plan on tonight's episode of Kimmel.