Just one, but it takes 5 episodes.
Three. One to do it, one to complain that it has already been done before, and one to repost this joke.
20 Episodes and Krillin dies.
Two. One to actually change the bulb, and the other to videotape so Christians can't claim God did it.
None, we just swap out your whole house
Bob, Bob, Bob, Bob, Bob and Ann
A: A decade Ba dum tish.
Fajita