Knuckle (2011) is a Documentary film that follows an epic 12-year journey into the brutal and secretive world of Irish Traveler bare-knuckle fighting. This film follows a history of violent feuding between rival clans. Currently, you can watch Knuckle on Google Play Movies, YouTube. Streaming availability may vary by country and platform over time. It has a user rating of 5.7 out of 10 from 35 votes. Fans of documentary movies may also want to explore similar titles below.