Guest Stars Eric Szmanda as Gregory "Greg" Sanders Robert David Hall as Dr. Albert "Al" Robbins Marc Vann as Conrad Ecklie Geoffrey Rivas as Det. Sam Vega Eric Stonestreet as Ronnie Litre Nicki Aycox as Ellie Rebecca Brass Daniel Dae Kim as Special Agent Beckman Anthony E. Zuiker as Casino Cashier Geoffrey Blake as Special Agent Conners Nancy Everhard as Special Agent Tessari Sandra Thigpen as Driscoll's Attorney Rodney Eastman as Keith Driscoll John Fugelsang as Vincent Thomas Avery