To bookend a tremendous ten season run, the CW will re-broadcast the pilot of Smallville for that nostalgic moment when we first met the young Clark Kent. Mark your calendars for Friday, April 8, 2011 at 8/7C to watch how it all began. The pilot episode originally aired on October 16, 2001.
After the Smallville pilot, the CW will air a Supernatural repeat, but do not fret. Both shows are back with new episodes the next week.
[Source] TVGuide