[There's only one "it" Raph can be talking about.]

I don't know. But I think if he was close, he'd have told us.

[No matter what Leo's nagging suspicions are, they'll approach this logistically. He won't leave a stone unturned, Donnie could still be here somewhere... Please.]

We'll start at Donnie's suite and move out to search the Metal Sector. Meet you there.

[They HAVE to try.]