07.14 Episode 146
Airdate: January 23, 2004

Jonas Quinn arrives from Kelowna bringing urgent news. His research has determined that naquadria, thought to be native to his planet, is in fact the result of a chain reaction that is converting naquadah deep underground, and the instability of the expanding mineral threatens to obliterate Kelowna and render the entire planet uninhabitable. Delegates from the three major powers of the planet, now known as Langara, arrive at the SGC to discuss the future of their world. However, the historic animosity among the three nations frustrates even Daniel's diplomatic skills, and the negotiations deteriorate almost immediately.

Carter returns to Kelowna and joins Jonas and his research assistant, Kianna, in finding a means to avert the crisis. Carter suggests setting off an explosion along a fault line to block the chain reaction, and the Kelownans have just the device to deliver the bomb: a Deep Underground Excavation Vehicle. Carter notices that Jonas is clearly attracted to Kianna, but she is suspicious of Kianna's knowledge of Goa'uld technology, and when confronted, Kianna reveals herself to be a Goa'uld. However, her expertise is vital, and Kianna joins Jonas, Carter, and Teal'c in piloting the DUEV through layers of rock and magma toward the naquadah vein.

The DUEV stops one kilometer short of its target, unable to proceed. Kianna volunteers to use Tok'ra crystals to create a tunnel large enough for one person to pass through and position the bomb. After arming the bomb, however, she is too weak to make the climb back, but the team refuses to leave her behind. Just as the DUEV reaches the critical point, an exhausted Kianna returns through the portal. The vehicle is piloted toward the surface as the bomb is successfully detonated and the planet is saved. Kianna is dying, but the Goa'uld sacrifices its life to allow the host to live, and Kianna returns with Jonas to her life on Kelowna.

Story by: Corin Nemec
Teleplay by: Joseph Mallozzi and Paul Mullie
Directed by: Martin Wood

Guest Starring: Corin Nemec as Jonas Quinn, Emily Holmes as Kianna Cyr, Gillian Barber as First Minister Dreylock, Patricia Drake as Councilor Lucia Tarthus, Julian Christopher as Councilor Vin Eremal, Bill Nikolai as Technician

Reference: Andari Federation, Communication Device, Kianna Cyr, Deep Underground Excavation Vehicle, Dreylock, Vin Eremal, Kelowna, Langara, Naquadah, Naquadria, P2S-4C3, Jonas Quinn, Lucia Tarthus, Tirania, Tok'ra Tunnels, Major Wood