Guest Stars J.K. Simmons as Dr. Clarence Weaver CCH Pounder as Lt. Lee Havercamp Rainn Wilson as Martin Grolsch Anjul Nigam as Dr. Renfro Elizabeth Connors as Claudia Kramer Max Van Ville as Josh Kramer Marita Geraghty as Jessica Avery Co Starring James Shanklin as Physicist Kieren van den Blink as Nikki Tanner Richie as David Kramer Dean Shelton as Joshua Kramer Cody Estes as Ryan Kramer Robert Manning, Jr. as Gerald Wallace Eliza Pryor Nagel as Brandi January Pugh as Linda Wallace
