SCI FI will air a 19-episode, SG-1 Season Eight marathon on Thursday, July 7. The fun starts at 8 a.m. Eastern/Pacific, and runs until 3 a.m.
Grab some sleep fast, because the Stargate Atlantis marathon will begin Friday, July 8 at 8 a.m. and runs until 3 a.m. on Saturday morning. SCI FI will show 19 episodes, but the cable network has yet to announce which one will be omitted.
(Thanks to Morjana for the tip)