Because I flipping love doctor who.

(bassline(plays throughout)
e-----------------------------------------------------------|
B-----------------------------------------------------------|
G-----------------------------------------------------------|
D-----------------------------------------------------------|
A-77-7777-7777-7777-77-101010-888-77-7777-77----------------|
E--------------------------------------------77-7777-7h8h10-|

play once with guitar then
e------------------------------------------------------------------------------|
B------------------------------------------------------------------------------|
G------------------------------------------------------------------------------|
D------------------------------------------------------------------------------|
A-77-7777-7777-7777-77-101010-888-77-7777-77---------15p1414-14141414-14141414-|
E--------------------------------------------77-7777---------------------------|

e------------------------------------------------------------------------|
B------------------------------------------------------------------------|
G------------------------------------------------------------------------|
D------------------------------------------------------------------------|
A-1414-171717-151515-1414-14141414-1414------------------------14-10-----|
E---------------------------------------1414-14141414-14h15h17------1010-|

e-------------------------------------------------|
B-------------------------------------------------|
G-------------------------------------------------|
D-------------------------------------------------|
A-------------------------------------------------|
E-10101010-1010-88-7h8p7-77-7777-7777-77----------| repeat


the 10101010 are 10s and not 1-0s same for the 15s, 14s and 17s

I hope this helps someone, there are other things going on in the background i havn't 
got figured out, a sweeping orchestral sort of thing.

i think it's:

D--------7-----------                             --------------------|
A--7h8h10-10p8h10p8p7 a few times then changes to -------7------------|
E--------------------                             -7h8h10-10p8h10p8p7-|

but i could be wrong, hell, it could all be wrong.

If this doesn't work just reverse the polarity!