Dillinger was a worker in ENCOM before plagiarizing Kevin Flynn's original work, after which he becomes the company's senior executive. He contributes to the rise of the Master Control Program that controls the ENCOM mainframe and creates the Sark program that acts as the MCP's second-in-command. Dillinger authorizes the MCP to tighten security controls upon learning of Flynn's seeking evidence of the theft of his work, but when he starts questioning the MCP's intent to defy his plans of capturing other programs, the MCP threatens to expose Dillinger's misdeeds. He is defeated and indeed disgraced when the MCP is destroyed, yet also relieved that the MCP is no more.
