His & Hers Ending Explained: Alice's Letter Reveals the Real Killer
Anna survives Catherine's lake-house trap, then learns Alice killed Rachel, Helen, and Zoe to bring her home.
His & Hers ends with Anna alive, Catherine Kelly dead, Richard arrested, and Alice Andrews exposed through a letter as the killer behind Rachel Hopkins, Helen Wang, and Zoe Harper. Catherine did kill her sister Andrea years earlier and tried to make Anna answer for what happened at St. Hilary’s, but Alice used Catherine’s history as cover for her own murders. Alice killed Rachel to bring Anna back to Dahlonega, killed Helen to keep her there, and killed Zoe to give Anna the family she lost after Charlotte’s death broke her marriage. The final twist means Anna was protected by the person who loved her most, and that protection is now another wound she has to carry.
The short answer
Catherine Kelly, also known as Lexy Jones, is the answer Anna and Jack think they have solved at Lake Zwerner. Catherine was part of Anna’s old St. Hilary’s circle, had been humiliated and assaulted after Anna’s 16th birthday party, and later killed her sister Andrea by withholding an inhaler during a family boat trip. She has motive, history, access to Richard, and the rage to make the case look finished.
But Catherine is not the person who killed Rachel, Helen, and Zoe. Alice is.
Alice watched Anna’s old tapes after Charlotte died and after Anna disappeared from home. When she reached the unmarked tape from Anna’s 16th birthday, she saw what Rachel, Helen, and Zoe had done to Catherine and how Anna had been trapped inside that night. Alice turned her grief into a plan. She used old doors, old keys, and the fact that older women are easy to ignore to kill the three women tied to that crime.
What happens in the finale
Catherine’s first killing comes first. On a family sailing trip, Andrea needles Catherine about her body, her food, and her choices, then asks Catherine to grab her inhaler from the counter. Catherine says she has it. When Andrea starts choking for air, Catherine does not move quickly enough to save her. That memory gives the later Lexy reveal a different weight: Catherine’s violence did not begin with Rachel’s murder.
In the present, Anna calls Jack from Lake Zwerner because she believes Lexy killed Rachel and Helen and that Richard may have helped. Jack tries to run to her, but Priya stops him at gunpoint. She has finally put together enough of Jack’s interference - the canceled phone trace, the contaminated DNA, the morgue lie, the way he kept pushing her toward Clyde - to know he cannot be treated like a clean detective on his own case.
At the lake house, Anna confronts Richard and Catherine. Richard turns violent, but Catherine is the real threat in the room. She no longer hides behind the Lexy name once Anna says Catherine. She remembers being lured into the woods 20 years earlier, being promised a party, being degraded, and being left with a crime everyone else buried. Anna insists she did not know what Rachel and Helen had planned. Catherine hears another excuse.
The fight spills to the water. Meanwhile, Clyde’s information reaches Priya: Rachel and Helen tried to blackmail Lexy over her sister’s death and Rachel knew Lexy from school. That gives Priya the missing link: Lexy Jones is Catherine Kelly. Jack reaches the lake, but not in time to resolve it without another body. Priya fires, and Catherine dies in the water where Andrea’s death started the private story Catherine had been carrying.
Afterward, Anna tells Jack what happened on her 16th birthday. Rachel was the ringleader. Helen and Zoe knew. They led Anna and Catherine into the woods, where men Rachel had contacted attacked Catherine while the other girls watched. Anna wanted to tell Jack many times, especially because Zoe was his sister, but she could not say it. Jack has just lost Zoe, and he has to hear that she was not innocent in the history that made this case possible.
For a little while, the public ending looks clean. Richard is arrested. Anna returns to WSK with a new contract and a Today Show offer. Jack moves Meg’s things in and starts taking care of his niece after Zoe’s death. Then Alice’s letter arrives and rewrites the case from inside Anna’s own home.
Who killed Rachel, Helen, and Zoe in His & Hers?
Alice Andrews killed Rachel Hopkins, Helen Wang, and Zoe Harper. Catherine Kelly is guilty of other violence, including Andrea’s death and the lake-house trap, but Alice is the serial killer at the center of Jack’s investigation.
Alice’s confession is precise about the three murders. She says killing Rachel brought Anna home. Killing Helen kept Anna in Dahlonega. Killing Zoe gave Anna the family she had lost. That last line is especially cruel because Zoe’s death leaves Jack raising Meg, pulling Anna back into the family wreckage around Charlotte, Jack, Zoe, and Alice.
The clues also fit Alice’s method. She is old enough to be overlooked, close enough to Anna to know the emotional pressure points, and local enough to move through familiar back entrances and old locks. She did not need to overpower the case with spectacle. She needed patience, old access, and other people’s assumptions about frailty.
Why did Alice kill Rachel, Helen, and Zoe?
Alice killed them because grief gave her a target. Charlotte died while Alice was watching her, and even though the doctor called it crib death and said no one was to blame, Alice blamed herself. Then Anna disappeared for months, leaving Alice with old tapes and the ache of a daughter she could not reach.
The unmarked birthday tape changed that grief into action. Alice saw Rachel, Helen, and Zoe’s part in the woods. She saw Catherine attacked and Anna trapped in the same night. For Alice, those women were no longer old classmates or possible witnesses. They were names attached to the night that had helped break her daughter.
Her logic is loving and monstrous at once. She does not kill to protect the law, clear Catherine’s name, or give Jack a solvable case. She kills to move Anna’s life. Rachel’s death forces Anna back to Dahlonega. Helen’s death keeps the story alive long enough for Anna to stay. Zoe’s death, in Alice’s mind, gives Anna a way back toward Jack and Meg. Alice calls that love “relentless.” Anna has to live with what that word cost.
Did Catherine Kelly kill anyone?
Yes. Catherine killed Andrea Kelly, her older sister, by withholding Andrea’s inhaler during the boat trip. Catherine knows what she is doing. Andrea trusts her answer, the family panics, and Catherine’s stillness becomes the first version of a pattern she later recognizes as killing getting easier.
Catherine also sets up the Lake Zwerner confrontation. She uses Richard, the canceled hotel room, the lake house, and Anna’s old memory to pull Anna back to the place where the buried story began. She wants Anna to answer for the birthday party and for the years of silence that followed.
What she did not do, according to Alice’s confession, is kill Rachel, Helen, and Zoe. Alice even says she never intended to kill Catherine. She wanted Catherine to go to prison for abandoning Anna in the woods and to become the killer in Anna’s story. Priya’s shot ruins that plan, and Alice does not pretend to lose sleep over it.
What the ending means
After Alice’s confession, Anna has no clean category for victim, killer, witness, or family. Rachel, Helen, and Zoe were murdered, but they also helped create Catherine’s trauma. Catherine was a victim, but she killed Andrea and tried to destroy Anna. Jack is not a murderer, but he damaged his own investigation to hide his affair with Rachel and protect himself. Alice loves Anna, and that love becomes the most dangerous force in the season.
That is why the letter hurts more than Catherine’s death. Catherine gives Anna an enemy she can face. Alice gives Anna a mother who saved her by ruining other lives. His story, hers, theirs, ours: by Alice’s letter, those labels feel less like viewpoints than claims on Anna’s life. By the last page of Alice’s letter, Anna’s life has been edited by someone else again, this time in the name of maternal protection.
The pregnancy note makes the ending even sharper. Alice writes because Anna will soon be a mother again, and she leaves instructions about love, hard work, planning, and endurance. Anna is not only inheriting a confession. She is being handed a model of motherhood built from guilt, vigilance, and blood. Her task after the finale is not to decide whether Alice loved her. She did. The harder question is how Anna raises children without passing that version of love forward.
What to watch next
If this ending worked for you, look for domestic mysteries where family grief and crime-scene logic keep crossing wires. The right follow-up mood is twisty, intimate, and mean enough to let love become evidence.