Season: 4

Original Airdate: February 8, 2008

Writer(s): Martin Gero

Director(s): Martin Wood

Guest Stars
Jewel Staite as Dr. Jennifer Keller
Isaah Brown as Caminous
Aidan Drummond as Renord
Nico Ghisi and Alberto Ghisi as Kids

Synopsis: On a diplomatic mission together, Carter, McKay and Keller fall into a subterranean mining facility left by the Genii. Every attempt to escape seems to put them in further jeopardy, and the constant tremors that shake their prison mean time is running out.