On Thursday morning, Susan vacuums while reflecting on her collapsing life. Thinking back to conversations with Felipe, she reconsiders who she saw kissing Warren. Felipe insisted that Aimee was faithful, while Rory had joked about Aimee’s sister, Venetia, being unfaithful. Susan now realizes that she may have seen Venetia, not Aimee, with Warren but decides that clarifying the mistake serves no purpose.

After going downstairs to check on Bella, Susan finds the crib empty. She frantically searches the house and runs outside but sees no one. Turning back, she discovers Bella lying on the lawn. Her neighbor Juliette approaches and suggests that Susan may have put Bella there herself, warning that calling the police might prompt child-welfare involvement. Susan realizes that Juliette will spread rumors that she’s harming her baby.

Venetia walks through Oakpark on Thursday, feeling satisfaction from having placed Bella on the grass. She compares the baby’s helplessness to Aimee’s powerlessness after Rory saw the screenshot of Susan’s message, which falsely accused Aimee of infidelity. While passing women setting up for a summer party, she imagines Susan’s panic, thinking that Susan might even believe she moved the baby herself. Venetia decides that her period of psychological torment is over and that it’s time to act.

On Thursday, Jon paces his office, consumed by worry that Susan may have been involved in Savannah’s murder. He calls Greta, who’s stressed about losing hockey-camp members, and reveals that Susan’s physio appointments were actually cover for marriage counseling. Greta berates him for cheating during counseling. Jon reveals that Susan has Savannah’s bracelet and voices his fears. Greta tells him to compose himself and hangs up.

Back inside, Susan finds the patio door unlocked, though she’s certain it was locked the previous night. She checks the side gate and finds it unpadlocked. She realizes that someone with small hands could slide the bolt from outside. Concluding that its’ unsafe to stay, she begins to suspect that Jon might be gaslighting her. She resolves to find out where Jon was the morning Savannah was killed.

Susan calls Jon’s office and tells his assistant, Benedict, that she left a wallet there last Wednesday morning. Benedict mistakenly assumes that Susan is Greta, who, he reveals, called in to see Jon at 11:04 am that day. Shocked to learn that Greta met with Jon on the morning of Savannah’s murder, Susan quickly ends the call.

Detective Kellerman calls, asking Susan to come to the station for more questions about Savannah. When Susan says that she can’t leave Bella, Kellerman agrees to come to her house. Recalling Juliette’s comments, Susan decides not to mention Bella being taken from the crib.

Kellerman asks if Susan was near Savannah’s house last Wednesday morning; Susan denies it, saying that she was home all morning. When asked about her car, Susan identifies it as a dark blue Ford Mondeo. Kellerman reveals that a car matching that description was seen outside Savannah’s house that morning. Susan’s face flushes, but she only states that she wasn’t there, silently realizing that Jon had the car that day.

Nika wakes late Thursday and thinks back to the brownie incident with Greta. She and Jess can’t involve the police because of her illegal “AWGoss” account. Jess urges her to delete it, but Nika refuses out of spite toward Maeve. She suddenly realizes that a responsible adult like Greta wouldn’t try to harm a student and concludes that Maeve put the ground almonds on her brownie. Meanwhile, Greta was trying to protect them both. Enraged that Maeve tried to kill her over an online conflict, Nika vows that she won’t get away with it.

On the night of Aimee’s and Rory’s deaths, Venetia looked at the screenshot that led Rory to kill Aimee and told Felipe that she was going to confront the woman who sent it. She also vowed that she wouldn’t go to prison for killing Aimee’s abusive husband. Using her scarf, she wiped down the barbell to remove her fingerprints and DNA. She then showed Felipe Susan’s address on her phone. Snatching the car keys from his hand, she ran to the car.

Venetia arrived at 26 Oakpark, which was mostly dark except for a living room light. Through the glass panels by the door, she saw a package addressed to Susan O’Donnell. To draw the resident out, she knocked over a bicycle. A woman (Savannah) holding a drink opened the door, and Venetia rushed forward, shoved her back into the house, and closed the door behind them.

Savannah struggled to understand what was happening. Assuming it was a burglary, she offered her jewelry, laptop, and phone. The woman grabbed Savannah, stating that she needed “Susan” to take responsibility for her actions.

After the gardaí leave, Susan worries about not revealing that Jon had the car and reflects on Greta’s secret office meeting with him. Even with the doors locked and the side gate padlocked, she decides that she and Bella can’t stay. Not fully trusting Greta, she calls Leesa. Within an hour, Susan and Bella are at Leesa’s house. Susan calls Jon to inform him of the move. He offers to join them, but she says there isn’t enough room and ends the call.

Maeve learns that Susan and Bella have moved in and feels resentful, believing that Susan’s presence will distract her mother. From her room, she overhears Susan call the hockey camp to ask if Greta was there last Wednesday morning. Perplexed, Maeve tells Leesa about the strange call. Leesa is confused but reminds Maeve that she has to babysit for Moira Fitzpatrick that evening. Maeve reluctantly agrees, and as she leaves, she finds Aoife eavesdropping in the hall.

The flashback to last Tuesday night continues. Felipe dragged Venetia out of Savannah’s house, and Venetia turned back and threatened Savannah, saying that she would return with a blade if she called the police. In the car, Venetia told Felipe that she wasn’t afraid of the police, as the woman was terrified and had no idea who her attacker was. She added that she didn’t care if she was caught because, with Aimee gone, she had nothing left.

Long after Venetia and Felipe left, Savannah recalled that her attacker called her “Susan.” She saw the misdelivered package by the door and theorized that the woman was at the right address but the wrong house. After searching for Susan O’Donnell online, she found a result that stopped her cold.

Savannah found an online social-diary article showing Jon and naming his wife as Susan O’Donnell. Furious, she realized that Jon lied to her about being single and living in Maynooth. Savannah tried calling Jon repeatedly, but he didn’t answer. While driving to his house, she texted him, threatening to announce herself to his wife. When he messaged her to calm down, she grabbed a loose brick and threw it through an upstairs window before speeding away. Savannah reflected on how she first met Jon on the street outside her home. She wondered if his original mission had been to hand her a misdelivered parcel. Instead, he had asked her out.

On Thursday, Celeste offers to buy Nika something to cheer her up after the brownie incident. Nika’s enthusiasm fades when Celeste suggests online shopping rather than a trip to Kildare Village. Nika asks to borrow Celeste’s car to visit her friend Jess, and Celeste agrees, skipping her Pilates class so that Nika can use it.

Jon leaves work early on Thursday, unsettled by Susan and Bella’s absence. At home, the solitude he sometimes wished for is disconcerting. He goes to Greta’s house, waters her wilting porch plants, and tells her that Susan has moved to Leesa’s. Again, he voices his fear about Susan and Savannah’s bracelet. Greta threatens to tell Susan what really happened last Wednesday morning and orders him out. As Jon walks back, a garda car pulls up. An officer asks him to come to the station for questioning, informing him that they’ll be taking his car for forensic examination.

Susan endures a tense Thursday evening dinner at Leesa’s. Afterward, she realizes that she forgot to pack Bella’s sleep suit and soother. Unwilling to see Jon, she resigns herself to walking to the store for replacements. As she prepares to leave, she receives a text from Juliette saying that the police picked Jon up. Susan changes her plan and decides to go home to retrieve Bella’s things.

Susan pushes Bella in her pram, heading toward her house. Feeling uneasy, she calls and texts Felipe, but he doesn’t respond. As a last resort, she messages Greta, who agrees to accompany her. At Greta’s house, they have tea. Greta mentions that she’s booked a restaurant for a sisters’ dinner for Susan’s upcoming birthday. The look on Greta’s face makes Susan realize that Jon and Greta have been meeting to plan a surprise party. Feeling relieved, she and Greta walk to her house.

Inside, Susan leaves Bella with Greta in the kitchen and runs upstairs to grab the needed items and the bracelet from her nightstand drawer. Her relief fades as she questions whether a party fully explains Greta’s appearance at Jon’s office. As fireworks from the neighborhood party go off, Susan goes downstairs and sees something that stops her cold.

A flashback to last Wednesday morning reveals that Savannah woke with a hangover. Jon arrived, and she slapped him before allowing him in. In the kitchen, Savannah asked about the woman who broke in the previous night. Jon claimed to know nothing about her and said he didn’t want to “get dragged into anything” (287). Enraged by his dismissiveness, Savannah grabbed her car keys and announced her intention to tell Susan everything. Jon took the keys from her, saying that he couldn’t let her do that.

Maeve walks reluctantly to Moira’s house to babysit, checking Snap Maps to avoid anyone from school. She notices that Ariana is at her house and flushes with dread. Moira is dressed for the Oakpark summer party. Babysitting is an ordeal—the toddler, Senan, is hyperactive and elbows Maeve in the eye. The Fitzpatricks return early, around 10:30, and Moira pays Maeve an unusually high €100. As Maeve leaves, she checks Snap Maps and sees that Nika is nearby in a car on the main road. Maeve turns off her own location and begins to walk home.