In honor of Supernatural's season six premiere, TNT on September 24th is running a 15 hour marathon! Starting at 5:00 am and ending at 7:00 pm, 15 episodes of Supernatural will air in a row, including ten episodes of season five. This will mark the first time season five will run in syndication (the previous season traditionally runs for syndicated shows when the new season premieres).
The list can be found here . Other episodes include "Ghostfacers," "Bloodlust," "Sin City," "In The Beginning," and "Nightshifter." It'll all close out with "Swan Song" at 7pm, finishing just in time to catch the season premieres of "Smallville" and "Supernatural"
on The CW.