S1E4 Walkabout

Lost Season 1 Episode 4 'Walkabout' aired October 13, 2004 on ABC and is the episode critics and audience reviewers most consistently identify as the moment Lost graduated from 'very ambitious survival drama' into something operating with formal intentions that network television had not attempted before. The Rotten Tomatoes critics consensus for the episode notes 'the episode that confirmed Lost was operating at a level of craft most network TV never reaches.' The flashback structure - used in some form on every major character throughout the series' six-year run - achieves its first iconic deployment here: Locke's pre-island life is revealed in a way that recontextualises everything the three preceding episodes established about him without contradicting any of it. The dramatic irony the episode constructs is the clearest early evidence of the writers' willingness to use the format against the audience's expectations rather than in service of conventional narrative pleasure. The final image of John Locke - the scene the Rotten Tomatoes consensus calls 'the show deploying dramatic irony at a level the audience wasn't prepared for' - is the moment Lost became a cultural phenomenon: the crash's most mysterious character decoded in a single image that makes the audience reconsider what the island might mean for him.