LATEST: Hit castaway show Lost will end after three more seasons, fatigued executive producers have confirmed. In January (07) DAMON LINDELOF and CARLTON CUSE revealed they envisioned the endpoint for Lost around episode 100. However, a new agreement with ABC will bring the total number of episodes to 120. Despite the increase, both Lindelof and Cuse admit setting a three season deadline is "incredibly liberating". Lindelof says, "(It's) like we've been running a marathon and we actually know where the finish line is for the first time." Cuse adds, "(We've had) a road map for the series with all the major mythological milestones and the ending in place for a while. What we didn't know was how long we had to play the story out. "By defining the endpoint we can now really map out the rest of the series in confidence. We sort of view Lost as a mosaic. Now there are only 48 more tiles that go into that mosaic, and we're figuring out, along with all the other writers, exactly where they all go." Lindelof wrote the pilot for Lost with fellow executive producer J.J. Abrams, and Cuse joined the series in October 2004.