Back in the 80s, when the Pixies were in their prime, the indie-rock press scorned any 60s band that reunited to play its back catalog on the concert circuit. By the time the Pixies patched up their differences and hit the road for sold-out reunion tours of Europe, Japan, Canada, and the U.S. in 2004, such quaint notions of artistic integrity had long since evaporated. This documentary by Steven Cantor and Matthew Galkin keeps threatening to turn into a real story as bassist Kim Deal tries to stay sober, singer Frank Black tries to tolerate Deal, and drummer David Lovering becomes addicted to Valium. But the famously passive-aggressive musicians manage to keep any real drama offscreen; the overriding impression is of four people enduring each other long enough to get their retirement portfolios in order. 85 min.