| No.overall | No. inseries | Title | Directed by | Written by | Original release date | viewers(millions) |
| 25 | 1 | "Just Dunk Me" | Stella Corradi | Laura Neal | 27 February 2022 (2022-02-27) | 0.435 |
| An unspecified amount of time after the end of the third series, Villanelle has turned to religion in an effort to redeem herself and is living in a church in England with vicar Phil and his daughter May. Eve, still going after the Twelve and now working in private security, tracks down Konstantin, who is now mayor of a Russian town, and obtains a lead on Hélène. Carolyn, having been demoted after killing Paul, also continues to hunt down the Twelve and finds out someone has been killing its members. Frustrated with her lack of official powers, she enlists the help of Eve and later defects to Russia in search of more information. Villanelle invites Eve to her baptism, but she does not attend. Villanelle makes a surprise visit to Eve, but Eve does not acknowledge her efforts to change. Frustrated, Villanelle returns to the church and attempts to kill May by drowning her in the baptismal font but manages to stop herself. Later that night, Villanelle has a vision of Jesus in the form of herself in drag. |
| 26 | 2 | "Don't Get Eaten" | Stella Corradi | Laura Neal | 6 March 2022 (2022-03-06) | 0.341 |
| Guided by her vision of Jesus, Villanelle joins Phil, May and their congregation on a camping trip. Villanelle appears to make amends with May after the attempted drowning, and May confides in Villanelle that her father Phil is responsible for her mother's death by crashing their car while driving drunk. Villanelle reveals this to the rest of the congregation in an attempt to hold Phil accountable, but she is met with rejection. She later overhears Phil and May talking about her negatively, lashes out and kills them. She then leaves the campsite, abandoning her vision of Jesus. Meanwhile, Eve tracks Hélène to an apartment in Paris. She is aided by her colleague Yusuf, with whom she also has a casual sexual relationship. They travel to Paris, where Eve confronts Hélène in her apartment. Hélène reveals to Eve that she is responsible for the murders of the members of the Twelve that Carolyn uncovered. She is doing this to find the leader of the Twelve. Eve and Hélène agree to help each other. |
| 27 | 3 | "A Rainbow in Beige Boots" | Anu Menon | Kayleigh Llewellyn | 13 March 2022 (2022-03-13) | 0.300 |
| Villanelle returns to London and breaks into Eve's hotel room. Eve, having returned from Paris, finds her there and rejects her calls for help, but allows her to stay in the room. Eve leaves to track down Hélène's car to a parking garage where she runs into a disgruntled ex-girlfriend of Hélène. Eve invites her for drinks in an attempt to obtain information on Hélène's target and learns she was married in Cuba to a presumably German man named Lars, before her relationship with Hélène. Eve believes Lars could be Hélène's target. Hélène meets with Pam, an assassin-in-training who expresses a wish to start working to escape her abusive family. After hesitation, Hélène agrees and assigns Konstantin as her handler. Using Eve's tablet, Villanelle arranges a meeting with Eve's psychiatrist friend Martin and holds him hostage at his home, forcing him to give her therapy. Martin tells her that her psychopathic tendencies were learned, and can possibly be unlearned. Eve returns to her hotel room and finds out Villanelle went after Martin. She meets Villanelle at Martin's home, shortly followed by armed police requested by Eve, who arrest and imprison Villanelle. |
| 28 | 4 | "It's Agony and I'm Ravenous" | Anu Menon | Kayleigh Llewellyn | 20 March 2022 (2022-03-20) | 0.337 |
| Villanelle is released from prison with the help of Hélène, who tells her that it is impossible to leave the Twelve and gives her a new assignment in Cuba. In Havana, Cuba, Villanelle kidnaps Carolyn, who has traveled there to interrogate Rustem, a member of the Twelve who survived an assassination attempt ordered by Hélène. She assaults Carolyn but spares her life after Carolyn reveals to Villanelle that she has known her since she was a child in the orphanage. Carolyn encourages Villanelle to interrogate and torture Rustem, who gives up the name of a restaurant before being killed by Villanelle. Carolyn runs into Lars at the restaurant, who is surprised to see Carolyn and flees. She tells Villanelle that she was in a relationship with Lars and that he is likely headed for Berlin. Meanwhile, Eve meets Hélène who confirms that Lars is in fact her target, and challenges Eve to find him before she does. While following up on a lead in Paris, she is contacted by Hélène who invites Eve to her apartment and taunts her with the news that Villanelle is out of prison. In response, Eve kisses Hélène and leaves the apartment. |
| 29 | 5 | "Don't Get Attached" | Emily Atef | Laura Neal and Georgia Lester | 27 March 2022 (2022-03-27) | 0.194 |
| In 1979, Carolyn and Konstantin attend an anarchist meeting in Berlin, led by Lars. When Lars is gathering ideas for names for their group, Carolyn suggests they name themselves after the number of founding members—twelve. Carolyn and Konstantin flirt, and eventually spend the night together. She later discovers that her father, a British spy, has committed suicide after being blackmailed. After learning that Konstantin is Russian, she confronts him at a lake. Konstantin says he is a KGB spy and responsible for blackmailing her father. Lars finds the two arguing and a fight ensues during which he falls into the lake and disappears, presumed dead. In the present day, Villanelle murders the abusive husband of her Cuban hostess, then leaves Cuba to meet Konstantin in Margate in an attempt to locate Hélène. Eve acquires an old Super 8 film of Lars and his British girlfriend. Viewing the recording, she recognizes a young Carolyn. Eve abducts Hélène's daughter Chloe from Paris as a response to Hélène bailing Villanelle out of prison. Hélène retaliates by driving Eve out to Margate, where Eve is forced to watch Villanelle being struck by an arrow and falling unconscious. Eve runs to Villanelle and cradles her. |
| 30 | 6 | "Oh Goodie, I'm the Winner" | Emily Atef | Kayleigh Llewellyn | 3 April 2022 (2022-04-03) | 0.273 |
| Villanelle's injuries are treated by Eve, Konstantin and Pam. Gunn, a Twelve assassin from Scotland who was also trained by Konstantin, might be behind the attack. An unsuspecting Villanelle later meets Gunn, who slips her a note stating that she was ordered to kill Villanelle by Hélène but chose to spare her, and that Hélène is in a hotel in Berlin. Eve travels to Berlin after being told by Villanelle that Carolyn and Lars are there, but only finds Hélène and follows her to her hotel room. Villanelle, who was already hiding in that room, kills Hélène in front of Eve. Still upset with Eve for having her arrested, Villanelle abandons Eve. She leaves for Scotland to meet Gunn after being given her location by Konstantin. Eve tracks down Carolyn and confronts her outside Lars' cabin near Berlin. Carolyn says that she is not part of the Twelve and that she is only there to get information out of Lars. To Carolyn's disappointment, Eve enters the cabin and kills Lars. Carolyn searches Lars' body to find a notebook. Villanelle arrives at the remote Scottish island where Gunn lives. She meets Gunn and asks if she can stay with her. |
| 31 | 7 | "Making Dead Things Look Nice" | Stella Corradi | Sarah Simmonds | 10 April 2022 (2022-04-10) | 0.354 |
| Villanelle wakes up on Gunn's island and accompanies Gunn on a hunting trip. The two exchange stories and kiss. Gunn immediately becomes attached to Villanelle, but Villanelle rejects Gunn upon learning that she is still loyal to the Twelve, and attempts to leave the island. Gunn responds by chasing Villanelle with a machete. Meanwhile, Eve is invited to karaoke by Yusuf, where she experiences flashbacks of her former husband and MI5 colleagues. Yusuf permanently leaves Eve after she tells him she cannot move on from her past. Eve visits Martin for guidance, who advises her to connect with the people who truly understand her. Eve receives a cryptic message on Hélène's phone and visits Konstantin, who tells her it is an announcement for a Twelve meeting. He advises her to bring Villanelle along with her and gives her the location of Gunn's island. Pam visits Konstantin after Eve leaves, and kills Konstantin on Hélène's final orders. A dying Konstantin reveals Hélène's death to Pam and asks her to deliver a letter and love declaration to Carolyn. Eve travels to Gunn's island and is ambushed by Gunn while Villanelle, who has hidden in the bushes, watches from nearby. |
| 32 | 8 | "Hello, Losers" | Stella Corradi | Laura Neal | 10 April 2022 (2022-04-10) | 0.354 |
| Eve blinds Gunn during their struggle, and she and Villanelle escape the island. They spend a loving day and night together travelling through the Scottish countryside to reach the Twelve meeting in London, after Eve convinces Villanelle to help her. Meanwhile, Pam delivers Konstantin's letter to Carolyn. Pam is offered a job by Carolyn, but she refuses and walks away. Carolyn, having followed clues in Lars' notebook, arrives at the Twelve's proposed meeting place shortly followed by Eve and Villanelle. Hélène's phone receives a message indicating that the meeting place has changed to a boat on the River Thames where a wedding is also taking place. At night, Eve and Villanelle board the boat, where Villanelle slaughters the present Twelve members while Eve distracts the wedding guests. Right afterwards Villanelle is shot by an unseen sniper. Villanelle saves Eve by shielding her and taking the shot as the two jump in the Thames, where Villanelle sinks into the depths with Eve unable to reach her. Carolyn, watching from a distance, acknowledges the assassination on a walkie-talkie. Eve resurfaces in the middle of the river, screaming in anguish. |
