I tried to get through s9 of SG-1 in one night, and failed. I crapped out around 10:30 and went to bed.
I even set the playback speed to 1.30. It made the episodes pop! I may have lost some nuance.
If you're looking for a reason to come back six, in 9x09, they actually walk to the end of the ramp with a shut off gate! I always wondered what it looked like back there!