[s7e14]: Fallout

: The episode features Kianna Cyr, a Langaran scientist who is revealed to be a Goa'uld spy. Unlike most of her kind, she develops genuine affection for Jonas and eventually sacrifices herself to save her host and the planet.

: The plot is often compared to a "Stargate version" of the movie The Core , involving a high-stakes mission using a deep-crust excavator to drill into the planet's mantle. [S7E14] Fallout

In this episode, the SG-1 team returns to the planet Langara (home of former team member Jonas Quinn) to help stop a catastrophic event: a deep underground vein of naquadria is undergoing a chain reaction that threatens to destroy the entire planet. : The episode features Kianna Cyr, a Langaran