Borg to Change Lightbulb

Q: How many Borg will it take to change a light bulb?
A: None, they just assimilate the bulb.

Mexicans in Star Trek

Q: Why are there no Mexicans in Star Trek?
A: They don't work in the future, either.

Enterprise Lightbulb Change

Q: How many members of the U.S.S. Enterprise does it take to change a light bulb?
A: The Enterprise is transporting a stuffy, pompous Federation diplomat to a crucial peace conference when the bulb burns out. Scotty rigs up some odds and ends that will keep it burning for twenty-four hours but they need to get a replacement in that time. So the ship makes an emergency detour to Alpha Regula IV, the nearest planet with any known light bulb stocks. However, when Kirk, Spock, McCoy and three security men beam down, a Klingon ship appears, so Scotty warps the Enterprise out of orbit. Meanwhile, on the planet, two of the security men are killed by a sentient energy field and the other dies when a native throws a poisoned spear at him. Kirk, Spock and McCoy are taken prisoner by the natives, who mistakenly assume them to be in league with the energy field which has been killing them, too. Kirk realizes that they have tons of light bulbs which could be useful to the Federation, so he attempts to communicate with the chief, who agrees to let Kirk have the light bulbs if he survives a duel with the tribe's greatest warrior. In a rough, tough and bone crunching fight, Kirk wins at the last minute. In gratitude, the chief allows him to sleep with his daughter, who has fallen in love with him. McCoy cures his wife of her chronic illness and delivers her baby. As they celebrate, the energy field appears and is about to kill everybody when Spock uses a mindmeld to convince it the tribe is not a threat. Meanwhile, in space, Scotty has resisted the entreaties of the diplomat to fall for the Klingons' phony peace ploy, violating Federation law when he overrules him, but later the diplomat is convinced when Scotty fights them off, and at the last minute, he returns to orbit and beams up the landing party, who now have all the light bulbs the Federation needs. After the last commercial break, they screw it in, and then Kirk, McCoy and Spock sit together on the bridge and make philosophical/humorous comments about what just happened. That stock shot of the Enterprise flying off into the starfield appears, and the episode ends.