Angel's brother...? Leonardo clenches his teeth; this is all wrong. A huge chunk of their lives is just missing from his little brother's memories. He lets go of Mikey's shoulder to run a hand over the top of his head, trying to think.

If Mikey really doesn't remember anything since that mansion...he wouldn't know that the Shredder was gone. He wouldn't know about how sick Don had gotten, and why finding him is so important to Leo and Raph.

He takes a deep breath, the surges of adrenaline melting away. There's...a lot of filling in to do, present matters and past, but he doesn't think he has the energy today. "Okay. Let's get some sleep first, guys. Later we can go over everything we know, and...what we don't."

There has to be a reasonable explanation. Leonardo just can't think of one; not right now.