A/N: I'm taking up another of Tempest(6)'s challenges "Write a story where the two characters switch jobs for the day and then "talk" about it. " This thing'll be a couple chapters long.

"Now really Doctor, is this -entirely- necessary?"

Well, isn't that a killing opening line? Don't you just really want to know what's going on? Aren't I evil not ot tell you? What, you thought I wouldn't tell you? Not so, of course I will, I just have to make the reveal-ment of the mysterious 'this' super climactic, or rather, anti-climactic because it's fun. Right. Anyway.

The Doctor was advance on Spock with a hypo, nothing big, nothing scary, nothing bad. But, apparently, unnecessary. The good Doctor McCoy glared.

"Yes, yes it is. I don't ask you if you're doing your job properly, you should do the same to me." He said, glaring, though I have already said that... the glare got worse, alright? Alright.

"I do not usually question your work.. but Doctor, I do not believe that this is required."

"You won't argue with me. I'm the doctor here!"

"Well... perhaps you should not be the doctor."

"Oh? Well then, would -you- like to take my place?"

"I do not believe that would be wise."

"Oh, why not?"

"The crew has the chance of getting used to a competent doctor."

"WHAT?!"

"I said-"

"I KNOW what you said. Fine, -you- can be doctor for a day. And -I- will be first officer and science officer."

"I do not believe that you-"

"I can do just fine. We start tomorrow. First shift."

"Yes Doctor."

"And Spock?"

"Yes, Doctor?"

"Try not to accidentally kill too many people."

A/N: Alright, next chapter'll start first shift the next morning.