Valack and Lydia in “Unfinished Business”

This teenager, Lydia, is the last genetic chimera. A young man or young woman, maybe even someone you know. A success where Theo and the others were failures.

Lydia

But we went through the list of genetic chimeras. There's no one else.

There must be one you missed. Another way they could have two sets of DNA. If you could see the face of this teenager, discover it's identity, then your friends would stand a fighting chance. The mask can help you see.