Dr. Maggie Sinclair was a professor who was captured by Arvin Clone and forced to build him a Mueller device.
Season 4
Maggie arrived in Krakow, Poland via plane and was checked in through security gates while talking to one of her family members. During the inspection, a security guard scanned her Teddy bear that she bought for her daughter and escorts her out of the airport to talk to her in private. As she walks down a tunnel with the guards, one of them grabs her from behind and renders unconscious with an anesthetic, where she was later abducted.
Maggie wakes up in a dark warehouse handcuffed to a chair and guarded by Carter, she immediately demands that someone tell her what they want with her, and this is when Sloane 2 makes his second appearance, introducing himself to Maggie.
He tells her that he needs her expertise to build an ancient artifact, but Maggie tells Sloane 2 that without a transformer coil, the machine won't work. Sloane 2 try’s to persuade Maggie to find another way, but she still says it is impossible. Sloane 2 then orders Carter to “persuade her”.
She is restrained in a chair with her hands behind her back and he begins to torture her with a belt sander (apparently applying it to her hands). The torturing is abruptly stopped when he notices the phone ringing.
Once the coil is retrieved, Maggie is able to build the device for Sloane 2. She tells him she would have been faster, if he had not ruined her hands (now bandaged). As she was being escorted out of the warehouse with Sloane 2 and his bodyguards, APO agents showed up and engaged in a firefight. Sydney managed to subdue or kill all of the guards and Maggie was saved.