4.12 “There’s No Place Like Home (Part 1)” – Jack and Kate meet Sawyer and Miles in the jungle. Sawyer is carrying Aaron, because he and Miles have been unable to find Claire. They talk, they disagree, (how unusual!) and Kate takes Aaron right before Jack and Sawyer continue on, following the helicopter signal. This is the moment that Kate becomes Aaron’s guardian/mommy. JACK: Take care of the baby, okay?