A fearless lover, criminal, and one-of-a-kind American freak, the late John Wojtowicz had enough personality to fuel two feature films. The first, 1975’s Dog Day Afternoon, earned Al Pacino an Oscar nomination for his portrayal of Wojtowicz on the day he sought to rob a Brooklyn bank to pay for his lover’s gender-reassignment surgery. The second, the new documentary The Dog, lets Wojtowicz be Wojtowicz. The result is a constantly surprising, sporadically horrifying, oddly loving portrait of a sociopath with a heart of gold. No fan of serious human freakery should miss The Dog. (Grand Illusion, 1403 NE 50th St, grandillusioncinema.org, 7 and 9 pm, $9, Aug 15-21)