[voice]
If it is a matter of being in another plane, or something like it, than the rest of the people in the dome, if I were back home I'd perform a summoning to break the barrier. But that only works if it's related to astral magic... [he lost you, didn't he.]
Anyway. I'm pretty sure this is related to whatever that dimensional-thing is that grabs us from our respective worlds and makes people disappear at random.