In Episode 4 of "The Lady," the story unfolds with the discovery of a car identified as Jane's. Douglas advises the police to approach with caution, and they find Jane inside, deeply asleep. She's taken to the police for interrogation, where Detective Smart sets up a recorder to document the proceedings. Douglas and Smart introduce themselves, followed by Jane's own introduction. Meanwhile, Francesca provides a retrospective on Jane, stating that she wasn't in her right mind and that she did love Tommy.

The interrogation begins, and Douglas guides Jane through the testimony. She explains that the argument with Tommy continued even after calling for emergency services. She drove for a while but returned after a phone conversation with him. Another argument ensued, but she still went to bed. He cuddled her and proposed sex, which triggered her fear. She grabbed a cricket bat to protect herself but then picked up a kitchen knife when he tried to grab her. He started pulling her hair and got on top of her, leading to her driving the knife into his body. According to her, that's how she escaped, though she never thought he was dead.
Later, she made several calls and sent messages to friends, acting as if she had nothing to do with his death. She confesses that she didn't know he was dead. Jane's mother asks if the murder case was an accident, as she had claimed. She believes the solicitor will sort things out. Jane states that the knife was never intended to kill Tom and that it was all a big accident. She panicked and ran out, locking the door behind her. When no sound came from the house, she knew he was dead.
Aleksandra notes inconsistencies in Jane's statements and asks her to move to a hotel until the trial ends. As she reads various headlines, she flashes back to their happy life with Tommy. During cross-examination, the prosecutor points out several inconsistencies. He notes that the messages were calculated to make her appear innocent and that she never mentioned anal rape to the doctor. Additionally, she claimed that she kept going back to the house even after feeling unsafe, and her earlier statement about just giving Tom a scratch contradicts her later claim that her hands were covered in blood.
On May 16th, 2001, the jury found Jane guilty of killing Thomas Cressman, and the judge sentenced her to life imprisonment.
Aleksandra invites Jane to London, offering her accommodation during the hearing. She tells Aleksandra she only thought that Tommy got a scratch. As she steps into Aleksandra’s house, Jane spots a newspaper headline with Roger titled, “Murder trial starts for Royal aide.” She tells Jane that she has utmost faith in British justice.
In the courtroom, the prosecution states that Jane went back to the house as a jilted and ultimately bitter woman, knowing that Tommy wouldn’t marry her. She committed a bloody, premeditated murder. Douglas states that Tommy was initially hit with a bat before being stabbed. There were no defensive marks on Tommy’s body, indicating he was defenseless at the time of the attack.
During the judgement delivery, the judge states that no matter how wronged Jane felt, she had no right to end Tommy’s life. He tells her that she ended Tommy’s life and ruined hers.
Through her testimony, Jane states that Tommy had tried to force himself on her. That is why she had a knife and a bat to protect herself. During the court session, David says Jane was obsessed with his brother. He says Tommy was a gentle kind of guy and was always worried about what Jane would do. The Defence counsel terms Jane’s sexual life as innocent, while Thomas was adventurous. She reveals that Tommy wanted to have anal sex and always asked her to wear kinky apparel. She also discovered sexually explicit emails on Tom’s computer. Although Jane says he was committed to their relationship, there were also moments of confusion from him.
Jane recalls one Saturday morning when Tommy put a pillow on her head, tied her to the bed, and anally raped her. However, the prosecution pokes holes in Jane’s testimony and reveals that the rape cases were fabricated to escape blame for Tommy’s death.
While at Aleksandra’s, June encourages Jane to give her a full recount of events. However, Jane warns her mother not to attend the court session since she will hear things she wouldn’t want to hear. She would talk about her childhood events that might shock her parents. Still, June supports her and asks her to say what she has to.
The Defense counsel talks about Jane’s undergoing a few sessions with a psychotherapist in the spring of 1999. Tom had arranged the sessions to deal with her sexual abuse at the age of 8. The trauma made her make less rational judgments. In heightened situations, she felt like she was in a “grey mist” of helplessness.
Again, the prosecution thinks Jane’s sexual abuse allegations are invented and are not legally proven.
After being sentenced to life imprisonment, Jane is escorted to the prison where she is greeted with mocking jeers. A psychiatrist confirms that she suffers from Borderline Personality Disorder (BPD), a condition that often manifests in self-sabotaging traits such as recurrent suicidal threats and impulses. Individuals with BPD also struggle with intense shame and an inability to form healthy emotional connections.
With this diagnosis, Jane secures a chance to appeal her case. At the climax of the final episode, we learn that in 2003, Jane appeals her case based on psychiatric evidence. However, her appeal is rejected, and the legal system fails to acknowledge her childhood sexual abuse.
In 2015, Jane is eventually released on license but is recalled in 2018 due to harassment allegations from an ex-boyfriend. Despite there being no evidence to support these claims, she remains incarcerated until 2019.
Throughout this ordeal, Jane's journey is marked by the complexities of mental illness, the challenges of the legal system, and the harsh realities of life behind bars.