A fabulous musician and troubled soul is followed in this peripatetic doc, which finds the brilliantly eclectic violinist forever struggling in the half-light between Czech assimilation—he even hosts Prague TV shows—and his Rom heritage, which makes him a target in some ignorant quarters. His own self-destructive, or at least self-limiting, impulses are on view, if never quite explained.

International Village, October 5 (10:50 a.m.); Rio, October 8 (9:15 p.m.)