Marcus Welby, M.D.

The Light At the Threshold (5x5)

: 09, 1973

Tracey Robbins has been plagued with diabetes for years and the disease has caused her to slowly lose her sight due to blood vessel malfunction. When her father fails to take her on a promised trip to Europe and her infatuation with Dr. Kiley undergoes a rude awakeing, the girl becomes withdrawn and refuses the operation.