Bruce puts his hand on (young) Nightwing's shoulder.

Bruce: Brian.

(y)N: Bruce. Remaining as inconspicuous as possible. Your usual Modus Operandi in either guise...Why...Why did you call me Brian?

Bruce: It's your name.

(y)N: You know...my full name...?

Bruce: Yes...(Steels gaze, pauses a moment before speaking in a low, stern voice) You've undergone recent trauma. Your memory's been impaired as a result.

(y)N (matches low volume of Bruce's voice): Yes. Interdimensional travel. Twice. Any memories prior to the first jaunt are...incoherent. Snippets. I remember you, but--

(Bruce raises his left hand to silence (young) Nightwing.)

Bruce: We should continue this conversation somewhere less--

(y)N (narrows eyebrows): Conspicuous?

Bruce (whispering): The hotel roof. One hour.