ABC’s LOST may not have answered every mystery set up over the course of five seasons, but did you know that J.J. Abrams first pitched the island drama to ABC as having no serialized mystery whatsoever? Or that the costly pilot got ABC’s then-president fired for his trouble? We don’t have to go back, the 21st episode of ‘You Think You Know TV?’ is right here, smoking out all the island secrets of LOST!

Most know the legend that ABC originally intended to cast Batman himself, Michael Keaton in the lead role of Jack Shepherd, on the condition the pilot kill him off, but Evangeline Lilly almost missed out on the series as well, owing to complicated work visas for Hawaiian production. Not only that, but the series filmed most all of its international plot in Hawaii, doubling it for Australia, South Korea, Iraq, London, Miami and many more.

‘You Think You Know TV?’ is a ScreenCrush original series that dives deep into the worlds of your favorite TV series and freeze frames a few tidbits you might not have known, as with our other installments for Seinfeld, Batman: The Animated Series, House of Cards, Power Rangers, Family Guy, Agents of S.H.I.E.L.D., Breaking Bad (x2!), True Detective, Empire, The Simpsons, Hannibal, Star Wars Rebels, Better Call Saul, The X-Files, The Flash, Arrow, Mad Men, The Walking Dead and Game of Thrones. Our companion series ‘You Think You Know Movies?’ has already tackled everything from Straight Outta Compton to Inception, but now we’re spinning the frozen donkey wheel and getting totally LOST.

Watch TV and movie installments of ‘You Think You Know’ down below, in addition to our LOST entry above, and let us know what shows we should cover next!

Check Out 100 TV Facts You May Not Know!

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