Quote from Moira in The Incident
Moira: Hm, it's noticeably cheerless in here today. If I didn't know better, I would suspect a little trouble in paradise. Patrick: David's just having a bit of a day. Didn't get a lot of sleep last night. David: Okay, I'm doing fine, thanks! Moira: David, what's wrong? [gasps] Your sleep apnea hasn't returned, has it? I thought that was remedied when you got your new nose. David: It was. Moira: Is it night sweats? You're not eating pepperettes in bed again! David: No. Moira: Night terrors? David: I don't wanna talk about it!