Fifteen-year-old Billy has a Maine accent, an abiding love for KISS, and a crush on a girl who works in a diner. He's also a badass: "I know I'm unique. I don't let it go to my head." Billy was diagnosed with Asperger's syndrome—a highly verbal disorder on the autism spectrum—after the film was finished, and some have accused the filmmakers of exploiting their subject. But Billy the Kid lets you see the character first and his autism second. It's a terrific documentary. (SIFF Cinema, 321 Mercer St, 633-7151. $8–$10, 7:30 pm, Jan 11–17.)