Episode 3x19, The Brig
Juliet and Jack talk and Kate comes and asks to talk to Jack privately. Juliet starts to leave, but Jack says that whatever Kate says she can say in front of Juliet. Kate says that people don't trust Jack and that's why they didn't tell him about the woman who parachuted onto the island.Juliet says they should tell Kate. Kate wants to know what, but Jack says no.
Episode 3x20, The Man Behind the Curtain
Juliet and Jack walk up as Sawyer plays Juliet's recording to the group on the beach. Jack asks where Sawyer got it.Juliet tells Sawyer to turn the tape over and listen to it. The recording is Ben telling her that they won't have time for the samples and Juliet should mark the tents of anyone whom she finds to be pregnant.
Juliet says that after seeing Sun's baby on the ultrasound, she told Jack what the Others were making her do.
Episode 3x21, Greatest Hits
Juliet goes with Jack to lead a group to an open meadow to explain that when the Others come to take the pregnant women, they are going to blow them up. Juliet will mark tents with white rocks and those tents will be rigged with dynamite.Later, Sayid says that he is trying to transmit to Naomi's boat. Juliet says it won't work because Ben is using a station called The Looking Glass to block the signal. The Looking Glass is an underwater station that she has never been to. Ben said that there was an incident and it was flooded.
Episode 3x22, Through the Looking Glass
Naomi wants to talk to Jack, but won't in front of Juliet. Juliet goes on ahead.Sawyer wants to go back to the beach to see about Sayid, Bernard, and Jin, but Jack doesn't want him to. Juliet says she will go with him. She knows where some guns are hidden. She kisses Jack before she leaves.
Sawyer asks how much further to the guns and Juliet says there aren't any guns. She lied because that is the only way Jack would let them go.
Juliet and Sawyer watch Tom, Ryan, and Jason on the beach. Sawyer wants to save Sayid, Jin, and Bernard, but Juliet points out that they have no weapons. Suddenly, Hurley comes flying in with the Dharma bus and runs over Ryan.
Sayid trips Jason and breaks his neck and Tom crawls to a gun, but before he can pick it up, Juliet steps on his hand. He surrenders, but Sawyer shoots him and says, "That's for taking the kid off the raft."
