"Naturally," Don says faintly, and then he gets to turn his attention from Mike's bizarre-even-for-a-Turtle stories to this new apartment. It's broadly similar to the one in the Metal Sector, though somewhat lacking in the technology department. That's more than made up for by the exercise equipment, the casually-scattered small weaponry, the climate settings, and the chaotic housekeeping, all of which combine to tell him his brothers live here.

By now he's been filled in - if in a confused, haphazard way - on exactly which brothers those are. So although it pains him to do so, as he moves inside he calls only two names:

"Leo? Raph?"