- First off, the drums are clearly beating along to the Doctor Who theme tune, probably the arrangement introduced in season 18. Certainly not the current arrangement.
- Second, John Simm makes a good Master, but I wasn’t overly impressed with the episode as a whole. Not quite as dark as I might have liked.
- USS Valiant is quite clearly the Helicarrier from S.H.I.E.L.D., which opens up a whole bunch of UNIT/S.H.I.E.L.D. crossovers.
- The Master watching the Teletubbies is a rather sweet homage to the Master watching the Clangers
- “Oh no, not another invasion of creatures from another dimension intent on eliminating humanity”