Claire's Escape is an orchestral piece from the Season 2 soundtrack. As the title suggests, it plays in the scene when Claire escapes from the Others.
In a flashback, Alex Rousseau drugs a pregnant Claire in order to rescue her. In the present, Claire searches for the vaccine in the Staff examination room, but she doesn't find it. She thinks that Danielle Rousseau was trying to bring her back to the station, and demands she tells her where the vaccine is. Looking at the scratches on Rousseau's arm, Claire begins to remember. In flashback, she wakes up alone in the jungle and calls for Ethan. Danielle discovers her, but Claire is alarmed. Danielle attempts to silence Claire and pull her away, but Claire scratches her as she tries to run. Danielle then knocks her out with the butt of her rifle. Back in the present, Claire remembers that Danielle was trying to help her.
Full list of appearances
Claire escapes from the Others with the help of Alex, and then Danielle.("Maternity Leave")
Dave tells Hurley that the Island is a hallucination, and by jumping off a cliff, he will return to the real world. ("Dave")