Here are the bass tabs for Doctor Who, the whole original theme, taken straight from the sheet music.

Note it is for 5 string, but the fifth string is only used once.

Standard tuning.

G-----------------|-----------------|
D-2-2-2-0-2-2-2-0-|-2-2-2-4-5-5-5-0-|
A-----------------|-----------------|
E-----------------|-----------------|
B-----------------|-----------------|

                                    .<-Guitar Comes in

G-----------------|-----------------|-----------------|-----------------|
D-2-2-2-0-2-2-2-0-|-2-2-2-4-5-5-5-0-|-2--->-0-2--->-0-|-2--->-4-5->-3-0-|
A-----------------|-----------------|-----------------|-----------------|
E-----------------|-----------------|-----------------|-----------------|
B-----------------|-----------------|-----------------|-----------------|


G-----------------|-----------------|-----------------|-----------------|
D-2--->-0-2--->-0-|-2--->-4-5->-3-0-|-2-2-2-0-2-2-2---|---------------0-|
A-----------------|-----------------|---------------0-|-2-2-2-0-2-2-3---|
E-----------------|-----------------|-----------------|-----------------|
B-----------------|-----------------|-----------------|-----------------|


G-----------------|-----------------|-----------------|-0-0-0-----------|
D-2-2-2-0-2-2-2---|---------------0-|-2-2-2-0-2-2-2-4-|---------------0-|
A---------------0-|-2-2-2-0-2-2-3---|-----------------|-------0-2-2-3---|
E-----------------|-----------------|-----------------|-----------------|
B-----------------|-----------------|-----------------|-----------------|


G-----------------|-----------------|-----------------|-----------------|
D-2->-----------0-|-----------------|---------0-0-----|-----------------|
A-----0->-2->-3---|-2-2-2-0-2-2-2-0-|-2-2-2-3-----3-0-|-2-2-2-0-2-2-2-0-|
E-----------------|-----------------|-----------------|-----------------|
B-----------------|-----------------|-----------------|-----------------|


G-----------------|-----------------|-----------------|-----------------|
D---------0-0-----|-----------------|-----------------|-----------------|
A-2-2-2-3-----3-0-|-----------------|-----------------|-----------------|
E-----------------|-3-3-3-2-3-3-3-2-|-3-3-3-2-3-3-3-3-|---------3-3-3-2-|
B-----------------|-----------------|-----------------|-3-3-3-3---------|


G-----------------|-----------------|-----------------|-----------------|
D-----------------|-----------------|-----------------|-----------------|
A---------------2-|-3-3-3-3---------|-3-3-3-3---------|-2-2-2-0-2-2-2-0-|
E-3-3-3-2-3-3-3---|---------3-3-3-3-|---------3-3-3-3-|-----------------|
B-----------------|-----------------|-----------------|-----------------|


G-----------------|-----------------|-----------------|-----------------|
D-2-2-2-0-2-2-2---|---------------0-|-2--->-0-2--->---|---------------0-|
A---------------0-|-2-2-2-0-2-2-3---|---------------0-|-2--->-0-2-2-3---|
E-----------------|-----------------|-----------------|-----------------|
B-----------------|-----------------|-----------------|-----------------|


G-----------------|-----------------|-----------------|-----------------|
D-----------------|---------------0-|-----------------|-----------------|
A-----------------|-------0-2-2-3---|-----------------|-2-2-2-0-2-2-2-0-|
E-0-0-0-0-0-0-0-0-|-3-3-3-----------|-0-0-0-0-0-0-0-0-|-----------------|
B-----------------|-----------------|-----------------|-----------------|


G-----------------|-----------------|-----------------|-----------------|
D---------0-0-----|-----------------|---------0-0-----|-----------------|
A-2-2-2-3-----3-0-|-2-2-2-0-2-2-2-0-|-2-2-2-3-----3-0-|-----------------|
E-----------------|-----------------|-----------------|-3-3-3-2-3-3-3-2-|
B-----------------|-----------------|-----------------|-----------------|


G-----------------|-----------------|-----------------|-----------------|
D-----------------|-----------------|-----------------|-----------------|
A-----------------|-----------------|---------------2-|-3-3-3-3---------|
E-3-3-3-2-3-3-3-3-|---------3-3-3-2-|-3-3-3-2-3-3-3---|---------3-3-3-3-|
B-----------------|-3-3-3-3---------|-----------------|-----------------|


G-----------------|-----------------|-----------------|-----------------|
D-3-3-3-3---------|-----------------|-2-2-2-0-2-2-2-0-|-2-2-2-4-5-5-4-0-|
A-----------------|-2-2-2-0-2-2-2-0-|-----------------|-----------------|
E---------3-3-3-3-|-----------------|-----------------|-----------------|
B-----------------|-----------------|-----------------|-----------------|


G-----------------|-----------------|-----------------|-----------------||
D-2--->-0-2--->-0-|-2--->-4-5-5-4-4-|-----------------|-----------------||
A-----------------|-----------------|-2------------->-|-(2)-------------||
E-----------------|-----------------|-0------------->-|-(0)-0--------->-||
B-----------------|-----------------|-----------------|-----------------||


x-->  hold note

x/x   slide


I hope you enjoy, feel free to stylise.

Bobby