Guest Stars Eugene Byrd as Dr. Sidney Trumaine Amy Aquino as Detective Lois Carver Jonathan Del Arco as Dr. Alex Cuevas Jerry Hardin as Vernon Abbott Blake Lindsley as Prof. Katherine Danvers Michael Mantell as Roger Shyler Peter J. Lucas as Karl Marchenko Co Starring Jon Huertas as Manuel Rios Joshua DesRoches as Lucas Wayne Mitchell as Uniformed Cop John P. Connolly as Neal Freely