[s0e9] The Next Doctor -

: The episode famously features a low-tech Victorian "TARDIS," which stands for T ethered A erial R elease D eveloped I n S tyle—a hot air balloon used by David Morrissey's character.

: The set for the Cyberfactory was actually the reused and disguised Torchwood Hub set from the spin-off series Torchwood .

: It marked the first time the revived series used actual television footage of the first eight Doctors (shown via "infostamps") instead of just drawings.