Barr has since had roles in “CSI: Miami”, “Medium”, “American Dreams”, “Commander in Chief”, “Bones”, and “The O.C.” before landing a seven-episode part as Ian Banks in “One Tree Hill” in 2006. Barr also scored parts in “Swingtown”, “Gossip Girl”, “Castle”, “The Big Bang Theory”, “Friday Night Lights”, “CSI: Crime Scene Investigation”, “Necessary Roughness”, and “Hatfields & McCoys”. Barr has since had two regular roles, appearing in 13 episodes of the thriller TV series “Harper’s Island” in 2009 as Christopher Sullivan. He joined the main cast of “Hellcats” in 2010 as Dan Patch. Barr was also featured in six episodes of the web series “Sex Ed: The Series” in 2009.