Knock knock...who's there....Doctor...Doctor Who, that's who. It's my kids' favorite joke and I'm sure was the beginning of the idea for this episode.


Knock knock was the first episode of this season to approach what I feel is a true Who story. It had twists. It had laughs. And it had the Doctor being a quirky alien. Splitting Bill and the Doctor worked nicely as she could be assertive and the rest of the ensemble could ask the questions. We are left with a lesson about life at the end as well. Very nicely done--the monster became the savior.
Now to the questions that we are left with after watching. The season opened with pictures of Susan and River on his desk. Suddenly, on a whim, Bill refers to him as her grandfather. Add to that the brief conversation about Time Lords and regeneration and Bill is looking like a more important person than just another companion. Could Bill be Susan regenerated? The landlord mentioning leaving your loved ones behind may be a subtle clue to that as well. This season just became interesting.

For now, this season has finally piqued my curiosity and I will give "Knock Knock" a fair score with 3 Tardises out of 5.