In Raiding The Raiders, all mobs are dead except for Captain Mok. Captain Mog is down to zero health, is unkillable, and the mission, hence the whole game is stopped. Nauscians do respawn at the beginning of the map, and around Captain Mok when the team leaves his vicinity.
I don't remember this ever being a problem before, but I finally got past this one. It turns out that ou have to get close to Captain Mok, and you can click to beam him up. He never stops attacking though, and doesn't go passive like a subdued prisoner ought to.