89 hours for the 120 episodes of Lost, across 6 seasons. The show ended in 2010: this total will not move. The median episode runs 44 minutes, and the count covers aired episodes only — specials sit outside it. On the show's page you will see 118 episodes: the database behind it merges some two-part episodes that the broadcast count lists separately.
That comes to 45 evenings of two hours, about 9 weeks at five evenings a week; at an hour an evening, reckon on 89 days.
Season by season
- Season 1 — 24 episodes — 18 hrs 11
- Season 2 — 24 episodes — 17 hrs 55
- Season 3 — 23 episodes — 16 hrs 50
- Season 4 — 14 episodes — 10 hrs 15
- Season 5 — 17 episodes — 12 hrs 31
- Season 6 — 18 episodes — 13 hrs 19
From one season to the next, the wait was 7 months, and up to 9 months between season 5 and season 6 — the usual network break. You are not bound by it.
Why 120 episodes weigh more than 236 of Friends
A 44-minute median against twenty-two: at double the format, you need half the episodes for the same time. Lost asks 89 hours for 120 episodes, Friends 87 for 236. The six seasons are substantial — between 10 hrs 12 and 18 hrs 12, no short season to catch your breath. It is a pure serial, built on questions raised at the end of an episode: on air you waited a week, sometimes seven months between seasons. Today the answer takes as long as a title sequence, and the show gains enormously from it.
Is Lost worth the marathon?
Stripped of everything, the survivors of a horrific plane crash must work together to stay alive. But the island holds many secrets. Created by J.J. Abrams, Damon Lindelof and Jeffrey Lieber for ABC, with Matthew Fox as Jack Shephard, Evangeline Lilly as Kate Austen and Terry O'Quinn as John Locke.
A round eight out of ten, 8.0/10. Nine weeks of evenings for the show that industrialised the cliffhanger — the kind that structures a whole season rather than an episode. It is probably the one here that gained most from changing habits: what was a weekly frustration became an engine. Six years of broadcast are caught up in two months, and the machinery works all the better if you do not stop.
Track Lost : Les Disparus on WatchTrailWho it is for
Save it for evenings when you can keep going: this is a serial to watch straight through rather than dip into, with long episodes. For anyone who prefers a story closed in six seasons to one that stretches on. If you plan to spread it across a year, know that this is the worst possible treatment for it: it rests on what you remember, and it raises more questions than a distracted viewer can hold.
FAQ
How long does Lost take? 89 hours for 120 episodes, or 45 evenings of two hours.
How many seasons does Lost have? Six seasons, aired between 2004 and 2010.
Where can I watch Lost? On Disney Plus in France, as of this article's last update.
Last updated: November 12, 2026 — TheTVDB data verified on August 16, 2026.