Kristen Scott Thomas for the win.
I would have said Joanna Lumley, but she's getting on a bit.
Really really not Jimmy Nesbitt. No, really.
I'd much rather have that Welsh guy who plays 'Geoff' from Coupling.
Johnny Depp, he'd make a good Doctor.
Or Bill bailey.
Maybe he better be a monster.
Simon Pegg. I'm sure he'd kill for the part (if he hasn't already).
:can keep this up all night cyclops:
"Well it's Forty-one Thousand Nine Hundred Sixty-nine OK -
Gotta war across the Milky Way - "
Iggius Popiscus and the Stoogii, "41,969"