The episode was directed by Karen Gaviola, and written by Elizabeth Sarnoff and Christina M. Kim.
Sun is regularly meeting Jae to learn English and seek advice on her relationship.
Sun is walking her dog when the doctor drives by and confesses that it is actually Jin who cannot have children.
He previously lied, fearing that Jin would burn down his practice if he found out the truth.
She later asks Sawyer for a pregnancy test, which turns out to be manufactured by Widmore Labs.
Locke convinces Ana Lucia that given her police training and encounters with the Others, she should interrogate Henry Gale.
Ana Lucia realizes that Charlie carries a concealed gun, and asks him to give it to someone who knows how to use it.
Sayid says it was not her fault, and explains that he holds the Others responsible for Shannon's death; he comments that once they find out if Henry is one of them, something will have to be done.
The next morning, Sawyer tells Bernard that Sun is pregnant in front of Jin.
Henry then mentions that if he were one of the Others, he would have probably led Ana Lucia, Sayid, and Charlie to a trap, where the Others would take them hostage and trade them for him.