Dr. Brooks says that Dave is in his imagination and shows him a picture of the two of them. Hurley sees that he has his arm around nothing and begins to believe that Dave is a hallucination. He still sees Dave, but when Dave tries to get him to escape, Hurley locks him out the window.
Libby is also a patient at Santa Rosa Mental Hospital.
On the island, Non-Henry swears that the real Henry Gale was already dead when he found him. Sayid tries to shoot non-Henry, but Ana-Lucia stops him.
Hurley sees Dave, from the hospital, in his bathrobe and slippers and chases after him. Later, he talks to Dave and Dave tells him that he's still in the hospital and that he's imagined the island and everyone on it. Dave tries to get Hurley to jump off a cliff, but Hurley doesn't do it. Libby finds him and talks him into believing that she and he and everyone on the island are real. They kiss and walk away from the cliff.