Finding Liara

Excavation Site on Therum.

The Normandy tracks Liara T'Soni to Therum, a mining colony in the Knossos system of the Artemis Tau cluster, but the geth are already on the surface, taking over several refinery facilities and dropping Geth Armatures from overhead.

Liara T'Soni.

Shepard leads Ashley and Tali to a mineshaft and down into a Prothean ruin, where they find Liara trapped behind a Prothean barrier curtain. Freeing her, they discover she is not in league with Saren and has no idea what the Conduit might be. As the squad leaves the ruined tower with Liara, they are confronted by a Korgan Battlemaster who is leading the geth and manage to defeat him as the unstable ruins begin to collapse. They escape just in time.

During the debrief, Liara explains her expertise is on the Prothean extinction. She has a theory they were not the first civilization to mysteriously vanish, and is amazed by Shepard's story of the Reapers.
    The Normandy departs for Noveria.