This episode introduces the character of Detective Anthony Burton, played by James Carpinello. He appears in five episodes in total.
The title of this episode is a play on words. In one context, it's the salutation that Peter gives at the end when he returns home. But it could also refer to Cary who spends the start of the episode in a heightened state.
Chris Noth (Peter Florrick) & Michael Medeiros (Server) also worked together on episode 4.20, Nurture (1994), of Law & Order (1990) as Mike Logan & Detective Harding respectively.