Tinker, Tenor, Doctor, Spy:
A very, very funny episode. The plot with the hierarchy was fairly weak, but it doesn't detract too much from all of the humor in this episode. A great comedy and a great Doctor episode!
Season 6 is off to an excellent start. Here are my ratings for the first four episodes:
Equinox Part Two 9
Survival Instinct 9
Barge of the Dead 8
Tinker, Tenor, Doctor, Spy 7
Average score: 8.25
Let's hope this trend continues!