“Through The Looking Glass” (originally aired 05/23/2007)

“Greatest Hits” (originally aired 05/16/2007)

“The Man Behind The Curtain” (originally aired 05/09/2007)

“The Brig” (originally aired 05/02/2007)

“Catch-22” (originally aired 04/18/2007)

“Left Behind” (originally aired 04/04/2007)

“Exposé” (originally aired 03/28/2007)

“The Man From Tallahassee” (originally aired 03/21/2007)

“Enter 77” (originally aired 03/07/2007)

“Stranger In A Strange Land” (originally aired 02/21/2007)

“Flashes Before Your Eyes” (originally aired 02/14/2007)

“I Do” (originally aired 11/08/2006)

“Every Man For Himself” (originally aired 10/25/2006)

“The Glass Ballerina” (originally aired 10/11/2006)

“A Tale of Two Cities” (originally aired 10/04/2006)

The difference between Lost’s first and second seasons is best understood through their respective finales.

“?” (originally aired 05/10/2006)

“S.O.S.” (originally aired 04/12/2006)

“Lockdown” (originally aired 03/29/2006)

“Maternity Leave” (originally aired 03/01/2006)