High Quality Content by WIKIPEDIA articles! "Par Avion" is the 12th episode of the 3rd season of Lost and the 61st episode overall, making it the exact midpoint of the series. It was aired on March 14, 2007 on ABC. The episode was written by Christina M. Kim and Jordan Rosenberg and directed by Paul Edwards. The character of Claire Littleton (Emilie de Ravin) was featured in the episode`s flashbacks.