Jia Jem Wearing Costume From Mass Effect 2

Later on the Normandy, the Illusive Man reveals that the Omega-4 relay - beyond which lies the Collector base - requires Reaper technology for the Normandy to safely navigate through it. Cerberus has located a derelict Reaper, disabled millions of years beforehand, and has sent a science team to recover the device - an IFF transponder. Upon boarding the ship, the derelict vessel puts up kinetic barriers preventing the team from departing the ship. Shepard later discovers that the Cerberus science team members have been killed and transformed into Husks. While battling through swarms of husks, Shepard encounters a friendly geth that saves Shepard from an ambush by several husks. Shepard later recovers the IFF and salvages the geth which is attacked and disabled by the husks. In order to escape the ship, Shepard destroys the reaper's Mass Effect core taking down the kinetic barriers but also destroying the ship. Shepard may turn the geth over to Cerberus or activate it. If activated, the geth adopts the name Legion and joins the team.
Shepard departs with the recruited members on a shuttle towards their next mission as the Normandy prepares the IFF for testing. However, after the IFF is activated, it emits a tracking signal and the Collectors are able to locate and board the Normandy. Joker is forced to give control of the ship to EDI - a potentially dangerous move. Gaining control of the ship, EDI pilots the Normandy away from the Collectors and rids the ship of all enemies, but the entire crew barring Joker is taken by the Collectors. Shepard's hand is forced - Shepard can either complete secondary missions and sacrifice the Normandy's crew, or immediately go through the Omega-4 relay to rescue them.