Lee heroic storyline.
In episode 5, near the end. zombies will be coming in from everywhere. there is only a couple of people still alive in the group kenny and clemintine. Lee sacrifices himself since he's going to turn into a walker anyway. to save kenny and clem. This giving lee an epic sendoff saving his beloved princess clem
Christa is pregnant - vomits near the start of ep 4, blames it on smell when clem asks.
when you first meet christa omid and her are talking about something and she quickly zips her mouth. She asks if you have kids.
she crys when you watch that woman about to have to terminate her baby