Upon landing on the Island, she decides to join Sayid on a hike to transmit a distress signal, after she and Boone have an argument about her selfishness. When they discover a French looped signal already being transmitted, Shannon's knowledge of the language is used to translate it. Later, Shannon has an asthma attack, but her inhalers are nowhere to be found. Sun (Yunjin Kim) cures her, by using eucalyptus plants to help her breathing. Because of her selfish and manipulative behavior, Boone brands Shannon useless. Sayid enlists her to help translate the maps belonging to the French woman who made the radio transmission, Danielle Rousseau (Mira Furlan). Shannon and Sayid soon form a romantic relationship. After returning from a romantic night along the beach with Sayid, she learns Boone has died after falling from a great height. At his funeral, Shannon does not speak, but allows Sayid to talk instead. Shannon holds Locke (Terry O'Quinn) responsible for Boone's death, and asks Sayid to take action. When he refuses, she steals the key to the gun case from Jack Shephard (Matthew Fox) and holds Locke at gunpoint in the jungle. When Rousseau arrives on the beach one morning to warn the camp of the Others' imminent arrival, Shannon prepares to migrate to the caves with the rest of the group. Before leaving on the raft the survivors have built, Walt Lloyd (Malcolm David Kelley) gives Shannon guardianship of his dog, Vincent, as a means to help her recover from her loss.