4x07 Episode 7

A water shortage means that the maternity home is busier than ever and two old schoolmates are reunited, but Marion shuns Shirley's attempts at renewing their friendship until they are brought together later in an unexpected way. Elsewhere, Barbara makes a revolutionary suggestion to help Sister Mary Cynthia treat the bedsores of her patient Tommy Mills, whose wife Gert may be more in need of care than he is. Fred thinks about taking the next step in his relationship with Violet.

This is the actual synopsis for this episode!