No, he can't say he does. He shakes his head. "Can you tell me more about them?" It could also be that they're from equally parallel worlds as this one. Having read through some of the information that Cassandra allows them to have, he just draws this conclusion.

But then, he also wonders: Why all the disguises? But he thinks maybe it's a result of being pulled in through the nexus.

So, suspicious indeed.