The two-hour episode "Serenity" was originally intended as the pilot for the show. The network (FOX) however, decided not to air it, citing that they wanted an episode with a more action-packed feel to it. With exactly one weekend to write a new pilot, executive producers
Joss Whedon and
Tim Minear wrote "The Train Job", which did appear as the first episode of the show. A slightly retooled version of "Serenity" was later showed as an 'origins' episode after _"Firefly" (2002/I)_ had been canceled.
more