Spoiler alert: Spoilers follow for all six seasons of LostIts time to go back. At long last, Lost has returned to Netflix just in time for its 20th anniversary, and summer is the perfect time for fans and newcomers to binge all six seasons. Much like how The Sopranos legitimized cable television, Lost legitimized the network drama, setting up compelling mysteries from the very first episode and fostering an era of online discussion and theorizing. Over a decade after the show ended, people are still intensely polarized over whether said mysteries were resolved satisfyingly, but theres no denying that it kept audiences hooked every week.