Reply to PostFirstly, I'm English and refuse to download episodes, so you guys are way ahead of me, so I could easily be very wrong:
I thought Claude (English invisible guy) was one of them. He know about Peter's family, He called Peter "another empath", He's invisible so wouldn't be on the photo, and he's old enough. I know that puts too many people into the original 12. Also (this may have been resolved already) I think the person killing company members is probably the empath Claude knew previously, rather than a group of people with varying abilities.
In any case, I want him back on the show!