For one, the somewhat signature way Lost rippled back and forth through its timeline was directly inspired by Watchmen’s innate ability to connect the past and present through key moments and visuals.
Of course, Lost also went the extra step to give the term “flash-sideways” prominence in the pop culture lexicon.
While John Locke didn’t wear a constantly changing mask that reflected his temperament, and the Island’s past generations didn’t feature any vigilante team-ups, some of Lost’s core conceits were indeed drafted from Alan Moore and Dave Gibbons’ Watchmen.