[Nathan stabbed himself on a hypodermic needle that had been disposed of in a bin-bag. Now he has instigated a witch-hunt and has bullied Sam into resigning because his bipolar disorder may have made him forget to dispose of the needle properly. As Sam's boss, Charlie confronts Nathan]
Charlie Fairhead: I just wanted to tell you face-to-face that I think undermining and intimidating the most junior, the most vulnerable member of the team here is utterly despicable. I don't want to hear of it happening again.
Nathan Spencer: I have every right to pursue my enquiries about that needle. I could have been infected with a lethal virus.
Charlie Fairhead: Oh, and I sympathize. But there is a world of difference between enquiring and bullying. And you have absolutely no right to indulge in the latter.
Nathan Spencer: My over-riding priority is to the patients. What if a member of the public had got a needle-stick injury? What if Sam had forgotten to clear up another one?
Charlie Fairhead: He couldn't - for the simple reason that *he* didn't forget to clear up the last one. I did.
Nathan Spencer: What?
Charlie Fairhead: Yes, I sutured a patient and didn't clear away the sharp properly. It was me, not Sam. There you are - you have your culprit.
Nathan Spencer: I think that's disgraceful you haven't owned up before.
Maggie Coldwell: Actually, Nathan, Charlie's being chivalrous. It was me, not him. He's just trying to protect me.
Nathan Spencer: What on earth's going on here?
Kelsey Phillips: Maggie, it's no use. But thanks for trying. Nathan, I left the needle out.
Nathan Spencer: Oh, I see. Ranks closing - d'you think I don't realize that? I hope you're proud of them, Harry.
Harry Harper: As it happens I am. At least I would be if they were all telling the truth. Because *I* left it out.
Nathan Spencer: This doesn't stop here - believe me.
[Nathan strides off, realising that he has been outflanked]
Harry Harper: Right, let's get back to work.
[Harry shakes Charlie's hand]
Harry Harper: Well done, you.