How many episodes were in season 1 of Lost?

25.

There are 25 seasons in the first season of the hit ABC TV series ‘˜Lost’™. The show premiered on American TV on September 22, 2004. The season had 24 regular episodes plus a special episode, ‘œLost: The Journey’, which aired on April 27, 2005. The 2-hour season finale was aired on May 25, 2005.