What a terribly average episode of Doctor Who:

1. Doctor leaves Companion alone on alien planet.

2. Companion gets in trouble.

3. Doctor goes out of his way to save someone, ends up condemning everyone.

4. Doctor tries to sacrifice himself because he's The Doctor.

5. Companion comes to the rescue using some kind of magic that will never be used again.

A lot of dependency on the Screwdriver this episode, I think he's going to lose it sooner rather than later. Maybe he'll get 10's during the 50th.

There is a lot of focus on the companions in Moffat Who. Like the Doctor himself isn't mysterious enough.