Unseen: Season 1, Episode 8
Nathan discovers Pierre and his vision which allows him to see the invisible ones. In exchange for finding Lily, Pierre helps Nathan and his team to collect in the houses the invisible ones they need for their tests. They put them to sleep with gas to take them by force to the hospital. Laurence discovers that Nathan has locked his daughter up with other invisible people. With no choice left, she launches the operation against the antenna.