Just one, but the light bulb is going to need to change itself.
Two: one to get it 95% done, and the second to give it the twist at the end.
None, they'll just keep complimenting it and get mad when it doesn't want to screw.
Probably one but you can't generalise.
When the Doctor changes the timeline, it's usually for a good reason.
Five: One to do it and four to tell you how they did it on the last job.
Yes
A living room
First of all you'd need a girlfriend to begin with.
Just one, but first the tire really has to want to change.
One you need for a rough patch, the other you need to patch your rough.
