Episode Detail: Dark Corridors - Marcus Welby, M.D.
A teenage violinist (Robin Mattson) develops symptoms of a rare children's disease. Dorothy Brander: Joanne Dru. Welby: Robert Young. Mrs. Kelly: Rosemary De Camp. Dr. Hanes: Douglas V. Fowley. Kiley: James Brolin. Miss Willow: Allison McKay.