Season 1 Episode 20 (April 30, 2007): Five Years Gone

Season 1 Episode 15 (February 12, 2007): Run!

Season 4 Episode 5 (October 12, 2009): Hysterical Blindness

Season 3 Episode 2 (September 22, 2008): The Butterfly Effect

Season 3 Episode 1 (September 22, 2008): The Second Coming

Season 2 Episode 9 (November 19, 2007): Cautionary Tales

Season 1 Episode 4 (October 16, 2006): Collision