Boone Carlyle is a fictional character from the television series Lost, which aired from 2004 to 2010. He is portrayed by actor Ian Somerhalder and is introduced as a member of the survivors of Oceanic Flight 815. Boone is known for his strong sense of loyalty and his complicated relationship with his stepsister, Shannon Rutherford. In the series, Boone is characterized by his desire to protect others and his struggle with personal insecurities. His character undergoes significant development throughout the show, facing various challenges on the mysterious island. Boone's story arc explores themes of sacrifice, love, and the search for identity.