Caitlyn Lynch

Caitlyn Lynch is the main villainess from "How to Make a Killing in Big Business," a three part episode from Season Five of Medium.

She was played by Tracy Pollan.

Caitlyn Lynch is a high ranking member of the Lydecker Corporation, and in Part 1, she contacted Allison DuBois regarding a job offer--the same one she had for the DA--using her psychic gifts to benefit the corporation. Caitlyn reveals that like Allison, she has visions via dreams. During this transition, Allison is involved in a case involving a serial killer who had been killing young women and removing their eyes. By the tail end of Part 2, Allison learns that Justin Lydecker, the son of CEO Douglas Lydecker, is the serial killer, but under the advisement of both Caitlyn and Douglas beforehand, she was not allowed to share her visions outside the office.

In Part 3, Allison is phoned by Caitlyn right after Allison had a vision where Justin was closing in on killing Douglas. The vision is true; Justin murdered her father, and to Allison's shock, Caitlyn turned heel and covered up the truth, instead stating that terrorists murdered Douglas. She explained to Allison that the truth would ruin the corporation and the family name, while stating that this was a terrorist attack would put them in a positive light. Later on, Allison had a vision that Caitlyn knew that Justin wasn't taking his medication and that he intended to kill Douglas, but the villainess denies the claim when Allison confronts her.

In the end of the conclusion, Caitlyn watched news coverage of Justin being arrested for breaking in to the home of Ashley Whitaker, Ariel's teacher, with the call to police coming after Ariel having a vision of Ashley being murdered in Justin's usual fashion. At that moment, Caitlyn is again confronted by Allison, who now had Davalos with her, and it was there that Caitlyn's role in Douglas' murder was revealed. Caitlyn had known full well of Justin's intentions of killing his father, and she used that as part of her evil plan to become CEO. She told Justin that Douglas planned on sending him away to Mexico, and when he visits, it would be the perfect site to kill him. As revealed by Davalos, the evil Caitlyn paid off the Mexican officials to make Douglas' murder look like an act of terror, and she became the corporation's interim CEO. Caitlyn is arrested for her role in Douglas Lydecker's murder, but not before terminating Allison from her position at the corporation, much to Allison's delight.