Stargate SG1 ep9-6 and Atlantis ep2-6
 

Stargate SG-1
SCIFI Aug 19 07:00pm
Series/Sci-Fi/Fantasy, 60 Mins.
"Beachhead", Episode #906.
Samantha Carter returns to SG-1 to join the team for a mission to free a distant planet from the Ori's control.

Stargate Atlantis
SCIFI Aug 19 08:00pm
Series/Sci-Fi/Fantasy, 60 Mins.
"Trinity", Episode #206.
Unperfected ancient technology could become the new source of energy for Atlantis.