In 1990, Mark arrived at Marco's Billiards and almost burned a cab driver to death when he did not approve of the price. Inside, they discuss with the gang formed by Stan Kovacs about how to steal the Mask of Rasputin. After they broke into S.T.A.R. Labs to steal some material, they succeeded in escaping the Flash but lost Franco Mortelli in the process. When they discovered the existence of the Flash, Mark wanted to quit and was killed by Stan who did not approved his decision.