I remember watching a show in the 2000's. I remember these two people having a little girl and the aliens helping them, so she turns out to be part alien. I also remember some part of the series, the government was exploring one of the alien ships with twins who were psychic and they died with blood coming out of their noses. At some point, the government puts a helmet thing on the girl's head to prevent her from talking to the aliens and a soldier keeps her company.
I think at the end of the series, the girl removes all the alien implants from the people and then she goes with the aliens. This is all I know and I have been looking for this show for forever.