I love The Wormery.
I think Iris and 6 have some of the best Energy, Iris, and a Doctor could have. Katy does an amazing Job here, like she always does with Iris, and so does Colin. Sure, this is very much a more lighthearted and fairly silly Story, but it does what it wants to do superb! I really enjoy the ending as well with Seven.
Overall, a campy but great time!