|Air date||16 November 2007|
|Written by||Steven Moffat|
|Directed by||Graeme Harper|
|Last of the Time Lords||Voyage of the Damned|
Ten's TARDIS merges with the Fifth Doctor's and they have to fix it before it wipes out the universe, or expands their arseholes to the size of Belgium, or something. Anyway it only goes for about eight minutes and is well worth a watch.
It attempts an explanation of P Diddy looking older compared to the Tenth Doctor - it's due to their shorting out of the time differential between them. Ten also talks about how much he loved being Five, which is especially grody considering that would make Georgia Moffett his actual daughter.