An offbeat episode (in which Jill Hennessy doesn't appear) involves plutonium and the FBI. Jennifer Finnigan joins the cast as Dr. Devan Maguire. Agent Scannell: David Ramsey. Mrs. Brown: Cyd Strittmatter. "Buddy Holly": Patrick Fabian. Leather Lauren: Lin Shaye. Woody: Jerry O'Connell. Macy: Miguel Ferrer.