Season 2, Episode 15
A client of Elle's wants to talk to Peter who is running late. Neal has to step in to take his place which forces Peter to play Neal.
Neal: Hi. I'm Agent Peter Burke.
Elle: Did we really do that?
Neal: You see any other option?
Elle: No.
Neal: So which one of us is going to tell Peter? I vote you.
Elle: Thanks.
Peter: Do I want to know?
Mozzie: Not yet.
Peter: There's a very good teacher inside that little, shiny head of his.
Neal: And, as a precaution, I'll be accompanying Elizabeth.
Peter: As my wife's husband.
