Agent Hart was a S.H.I.E.L.D. agent active in 2008. He led a mission to Bahrain to apprehend the potential Gifted person Eva Belyakov. When Agent Phil Coulson failed to get her to turn herself over to them peacefully, Agent Hart led a team of S.H.I.E.L.D. agents to apprehend her by force. However, Agent Hart and his team agents all fell under the control of Eva's daughter Katya, who unknown to them had the power to make anyone she touched her slave. Agent Melinda May freed Agent Hart and the other agents from Katya's control when she killed her.
His status following the events in Bahrain are unknown.