7/8
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19. Michael Emerson, who would go on to win an Emmy for his portrayal of the Others' leader Benjamin Linus, was originally cast to play Henry Gale in a guest role. "It was supposed to be only a three-episode arc," Emerson told SyFy. "I think they were trying it out, or trying me out… trying the idea of Benjamin Linus out, to see if it would work." He would go on to become a fan-favorite series regular.
20. Because of the show, the numbers 4-8-15-23-42 became a popular lottery number to play, with the numbers actually being the winning one in 2011.
According to the Mega Millions website, which has received "unprecedented traffic," 41,763 people matched four of those numbers and earned $150, while a lucky two matched all six and split an estimated jackpot of $355,000,000.