The screening starts tonight at 7 p.m. and is free, but there's a $5 suggested donation (if you want to avoid that, try selecting the $0 option and printing your ticket off the DBG's website so you don't have to look anyone in the eye and admit you're too cheap to donate; after all, the documentary will make you feel guilty enough already). The series continues with a screening of the Brazilian documentary Pachama on April 19 and Allan Houser: An American Master, the story of a Native American sculptor, on May 14. For more information on the series, call the DBG's registration line at 720-865-3580.