One of the three possible places to go after meeting with the council and becoming a Spectre. Here, you must find Liara T’Soni, one of your recruitable squad members. Unlike the other planets, you are not told specifically which planet she is on, only that she is in the Artemis Tau cluster. She is on the planet Therum, in the Knossos star system. The mission starts off with you in the Mako, but after you pass through several gates, must get off and travel on foot, where you will fight a Geth Armature. After the fight, it's just a matter of freeing Liara, and rescuing her. You will then fight against a Krogan sub-boss to complete the mission.