During a work retreat, Lisa approached Derek, believing that Derek only rejected her to protect his career. When Derek emailed her back saying to leave him alone, she only responded with a smiley face.
But on New Year's Eve, Lisa sent Derek an email containing many risque pictures of her. Derek was about to report Lisa to Human Resources, but learned there that Lisa had quit her job at the company, making him think the problem was solved.
Lisa later approached Derek in his car and flashed him, but Derek immediately forced her out of his car, angering her. His comfort led the delusional Lisa to believe he reciprocated her feelings, and she made her feelings known by sexually accosting him in the bathroom during a company Christmas party, which Derek rejected. Lisa also became friends with Derek's co-worker Patrick.ĭerek acted friendly towards Lisa and also comforted her when he found her crying in the break room, claiming to have just been broken up with. She began listening in on Derek's office phone calls, looking through his office, and it is implied that she began poisoning office employees to make them sick so she could keep working with him. She instantly became fixated on Derek and began scheming to be close to him. She was a temp worker for the finance company that Derek Charles worked at, and she first met the businessman in the elevator of the building. Lisa Sheridan (Ali Larter) was the villainess of the 2009 thriller Obsessed.