Alfred Hitchcock once claimed to have entered a Hitch look-alike contest and lost, characteristically making a joke out of a long-held private obsession. Doppelgängers, impersonators, imposters and victims of mistaken identity - innocent men wrongly presumed guilty - stalk his movies and television shows and now provide the inspiration for Double Take. Loosely based on a short story, August 25th, 1983 by Jorge Luis Borges, it starts with the idea of the Master locked in a murderous mano a mano with his own double. "Two of you is one too many," as he puts it.