5. The TARDIS
The oldest companion of them all, there is so much continuity surrounding the old girl, that a lot of it's scrambled; not least in 'The Name of the Doctor' when Steven Moffat rewrites the idea that the TARDIS stole the Doctor, only a series after Neil Gaiman had written that line. Gaiman however did continue many ideas from the Classic Series; the Doctor
had rebuilt a TARDIS in
The Claws of Axos and T
he Horns of Nimon, both the Fourth and Fifth Doctor had deleted rooms (
Logopolis,
Castovalva) before the Eleventh, the TARDIS had sent telepathic messages to inhabitants in
The Edge of Destruction, and just like his third incarnation, Eleven travels just with the console of the TARDIS. The famous TARDIS swimming pool first seen in
The Invasion of Time has surfaced multiple times in the Moffat era, notably when it saves River's life in 'Day of the Moon', and in 'The Christmas Invasion', we even get a glimpse of the TARDIS wardrobe. Emergency Programme 1, from 'The Parting of the Ways' returns in 'Silence in the Library' and The Hostile Action Displacement of
The Krotons makes a return in Mark Gatiss's 'Cold War'.
In 'Journey to the Centre of the TARDIS', we may see the light chamber from 'Tooth and Claw' and the Doctor's cot from 'A Good Man Goes to War', but what about all those voices that float around the console as the TARDIS leaks the past? There's Susan saying that she invented the term "TARDIS" (
An Unearthly Child), Three telling Jo that the ship's dimensionally transcendal (
Colony in Space), Eleven calling Idris "You sexy thing" ('The Doctor's Wife'
) and Nine declaring that the assembled hordes of Genghis Khan couldn't break through those famous blue doors ('Rose'). Perhaps it's no surprise that continuity arises often in the TARDIS. She does exist across all time and space, after all.