What's happening?

American Gothic: 1x8

Rebirth

Merlyn borrow’s an unborn child’s spirit and reappears as Halle. Both Lucas and Caleb realize what has happened, and while Lucas tries to keep Merlyn in his world, Caleb knows she must return the spirit to the baby before it’s too late.

American Gothic: Season 1 Episode 8
Jan. 03, 1996