Steven Moffat has spoken exclusively to BBC America's blog Anglophenia about the interplay between David Tennant and Matt Smith in the Doctor Who 50th Anniversary Special, The Day Of The Doctor. He describes them as 'quite a double act', and says that they were both very skilled in finding the spaces and similarities between the different Doctors.
Watch the clip here:
The Day Of The Doctor airs worldwide in over 75 different countries on Saturday 23rd November from 2.50pm ET on BBC America and 7.50pm GMT on BBC One. Watch BBC America's Doctor Who Takeover all this week starting from 8am ET on Monday 18th November