The Master Control Program (or MCP) is the main antagonist of Tron. It is a rogue computer program created by Ed Dillinger (also played by David Warner, and main human antagonist) that ruled over the world inside ENCOM's mainframe computer. During the rule of the MCP, many programs were enslaved and pitted against the program's henchmen, led by Sark (also played by Warner). It was voiced by David Warner.