The Double (2011)

The mysterious murder of a US senator bearing the distinctive trademark of the legendary Soviet assassin Cassius forces retired CIA operative Paul Shepherson to team with rookie FBI agent Ben Geary to solve the crime Having spent his career chasing Cassius Shepherdson is convinced his nemesis is long dead but is pushed to take on the case by his former supervisor Tom Highland Geary who wrote his Masters thesis on Shepherdsons pursuit of the Soviet killer is certain that Cassius has resurfaced