Doctor Who: 13 Cool Details Revealed In Steven Moffat's Time Of Angels Commentary
8. This Shot Of The Byzantium Wasn't In The Plan
After the opening title sequence, the very first shot shows the TARDIS chasing after the doomed Byzantium spaceship.
Normally, cool-looking effects shots like these are pre-planned and factored into each episode's tight budget, but in this case, that wasn't what happened.
According to Moffat, this particular shot "wasn't in the script" and it "wasn't in the plan". Rather, it was offered up by The Mill - the visual effects company that worked on the episode - and of course, the Doctor Who team accepted it gladly.
From Moffat's words, it's not clear whether they got this shot for free, or whether they still had to pay for it. He simply says that The Mill "gave us a shot".
If we had to guess, we'd probably say that it wasn't free - purely taking into consideration the amount of man-hours required to produce something like this - but either way, it was a nice gesture, and a damn fine shot.