As an actor he has starred in the films No Way Out, The Calcium Kid, The Football Factory, Layer Cake, Unleashed, Batman Begins, 7 Seconds, The Business, The Ferryman, Eastern Promises, Sucker Punch, City Rats, Wrong Turn 3: Left for Dead, Dead Man Running, Kick-Ass, Clash of the Titans, The Double, Sons of Liberty, and Robot Overlords. Hassan has had recurring roles in the TV series EastEnders, Dracula, 24: Live Another Day, and NCIS. He executive produced the films Dead Man Running and Service Man.