Two, but you have to get them in there first.
How many dragon Ball z characters does it take to screw in a lightbulb? Only one, but it'll take at least 6 episodes!
Just one, but it takes 5 episodes.
How many libertarians does it take to screw in a light-bulb? None. The market will take care of it.
Two. One to hold the bulb, and another to spin the story until the bulb fits.
Mice outfit!
Sir.