Please answer the following question about this movie plot. If it's un-answerable, please output "No answer". Question: Who does Karla tell she wanted to free Kaitlyn but was afraid? Movie plot title: Karla Movie plot: The film starts with a framing device of psychologist Dr. Arnold (Patrick Bauchau) in a session with Karla Homolka (Laura Prepon) on May 11, 2000, at Canada's Regional Psychiatric Centre in Saskatoon, Saskatchewan. Dr. Arnold's evaluation will determine Karla's eligibility for parole. During the session, Dr. Arnold shows Karla a photo album of herself and her husband Paul Bernardo (Misha Collins) in happier times, and Karla has a memory of how they first met. However, when Dr. Arnold introduces the subject of Karla's sister Tammy, Karla becomes uncooperative. Over the following weeks, Dr. Arnold probes Karla about her knowledge of Paul's secret life as a serial rapist, and it is revealed that shortly before their marriage Paul began to rape women. Paul convinced Karla to help him rape her sister on camera. At first Karla disagrees, but eventually steals Halcion from the veterinary clinic where she works. Tammy gets drunk at a Christmas party and becomes unresponsive after the two drug her. Tammy is raped, and ends up getting sick while drugged, choking on her own vomit. Karla calls 911 and the two hide the assault evidence so her death would appear accidental. Afterwards, Paul beats Karla for "ruining his movie". Karla learns never to ruin Paul's "movies". Karla tells Dr. Arnold that Paul became obsessed with Tammy and kept watching the video after her death, even showing it to friends. Paul also threatened to reveal Karla's role in her sister's murder if he should get into any more trouble, but Karla finally leaves him anyway. Paul is open with Karla about his crimes, yet Karla does not object to them, even when Paul begins to bring his victims home. Although disturbed at that part of Paul's life, Karla learns to accept it, knowing that she too will be killed if she does not. At Paul's request, Karla hesitantly participates in these assaults. Paul kidnaps a young girl, Tina McCarthy, and forces her to undress on camera. Karla witnesses this, but is too afraid to tell anyone. Tina is held for 3 days, and is...
Answer:
Dr. Arnold