Marks the first time where Eileen Atkins (Ruth) doesn't appear in an episode since she joined the cast in season 5.
There is a patient named Wendy Miller. This is a play on the character Windy Miller from the 60's Children's Show Camberwick Green.
Introduction of a new dog. The first dog for the first three seasons was a mutt with long hair. Then there was a smaller, shorter-hair dog, Buddy. This dog marks the third.
Patients name - Wendy Miller. (Windy Miller)