'I…think I did something,' Alex admitted quietly.
Alex admitted reluctantly.

"Unless Assassin abilities now include 'teleportation' –which would be rather useful, by the way- the other explanation is that
ehn, stylistic tweak: -rather useful, by the way - the most likely explanation is that

and then Alex was talking to me. He didn't remember anything so we just assumed he was my ancestor."
"Shit, Desmond, why didn't you say anything?" Rebecca asked softly.
(Because I just realized this never got spelled out)

-assumed he was my ancestor."

"Just to be clear here, when you say 'Alex', you mean Alex Mercer?" Shaun asked, glaring.

"Uh, yeah." Well, yes and no, but now was probably not the time to get into that whole situation.

"Shit, Desmond, why didn't you say anything?" Rebecca asked softly.