The David Tennant Treat 4 Today is about the Doctor Who 50th Anniversary episode, The Day Of The Doctor.
Apologies that I do not remember where this came from but it is the first part of a great article explaining the relationship between that episode and Doctor Who both past and present.
'The title sequence recreated the look of the opening titles seen throughout the early days of Doctor Who and, as with the very first episode, the first person we see in The Day Of The Doctor is a policeman.
The sign the policeman walks past in the opening scene reads ‘I.M. Foreman / Scrap Merchant / 76 Totter’s Lane’. This is another nod to the first ever episode – An Unearthly Child. In that story, the Doctor and his TARDIS are first seen in the ‘junkyard’ at that address.
Clara is working at Coal Hill School – the school that Susan (the Doctor’s granddaughter) attended in An Unearthly Child. The sign outside the playground reveals the Chairman of the Governors is I Chesterton… Could this be Ian Chesterton, Susan’s teacher and one of the Doctor’s first companions?
As Clara zooms off from the school to meet the Doctor, she passes a clock that reveals the time to be 5.16, which just happens to be the exact time that An Unearthly Child was first broadcast on 23 November, 1963. That moment in history can be designated 17:16, 23/11/63 and that sequence of digits: 1716231163 happens to be the activation code of the Vortex Manipulator, as briefly glimpsed when the Doctor scratches the numbers into the cell wall.
‘The ravens are looking a bit sluggish. Tell Malcom they need new batteries.’ Here Kate is possibly referring to Professor Malcolm Taylor – one of UNIT’s scientific advisors who assisted the Doctor during Planet Of The Dead.
When the Doctor sees the painting in the National Gallery he declares, ‘It’s the fall of Arcadia – Gallifrey’s second city.’ In Doomsday, the Doctor mentions being present at the fall of Arcadia and implies the mere memory of the day remains harrowing.
‘The High Council is in session…’ That session is seen in The End Of Time and was chaired by Rassilon.
One Time Lord says, ‘What is the Moment? I’ve never heard of it!’ He obviously hasn’t watched The End Of Time where the weapon is first mentioned! The Moment’s ‘interface’ is of course played by Billie Piper who played Rose Tyler in the eras of the Ninth and Tenth Doctors.
Osgood wears a scarf similar to that favoured by the Fourth Doctor. And when we see the children of Gallifrey (during the scene where the Moment discusses them with the War Doctor) we glimpse what looks like a mini-version of the scarf being worn by one the youngsters playing in the sunshine.
The Tenth Doctor’s first words in The Day Of The Doctor are ‘Allons-y!’ He first used the phrase in Army Of Ghosts and went onto exclaim it on many occasions. It’s a French expression meaning ‘Let’s go!’
The alien shape-shifters The Zygons were introduced in the Fourth Doctor adventure, Terror of the Zygons and one was seen very briefly in Logopolis. The Doctor mentions a run-in with them in The Power of Three, apparently encountering them in Paris with Amy and Rory.
Terror of the Zygons begins with the Doctor returning to Earth to meet the Brigadier after his old friend contacted him using the space-time telegraph – the device seen in the UNIT archive in The Day Of The Doctor.'