Did you get enough sleep last night? Are you sure? How can you be sure? In 2002's Insomnia, Academy Award winning filmmaker, Christopher Nolan, explores the extreme importance of a good night's sleep (among other important themes and scenarios). If you have not discovered this one yet, it is certainly a hidden gem among an already celebrated filmography. Buoyed by masterful performances from Al Pacino and Robin Williams, Insomnia keeps you on the edge of your seat and leaves you guessing until the very end. Trust us, this film is worth staying awake for.