Joseph Goldberg (Penn Badgley) is a bookstore manager at Mooney's who stalks and dates Guinevere Beck in the first season.
At the end of season 3, Joe kills Love and moves to London, where is given the cover identity of Jonathan Moore, a college English professor.
While in London, Joe undergoes a psychotic break that causes his personality to dissociate, leading him to unconsciously commit a string of murders.
[2][3] Peach Salinger (Shay Mitchell; season 1) is a wealthy and influential socialite and Beck's best friend whom she met at Brown University.
Love's parents elected to cover up the death to protect Forty, who grew up with severe unresolved trauma and developed an addiction to alcohol and drugs.
She later went to culinary school and fell in love with a deaf man named James whom she married, but he ultimately died of a medical condition.
She secretly discovers that Joe has been stalking her and keeps a glass cage inside his storage unit, which she takes as signs of his passion.
Love learns that Joe was in a sexual relationship with his landlord Delilah and later discovers her being held hostage inside the glass cage.
The next day, Gil, a neighbor, reveals to Love that Henry contracted measles from his twin daughters and that he and his wife are both anti-vaccination.
Love buys a pregnancy test and messages Forty as if he were a living person, confessing that she might be pregnant with Theo's baby.
[7] Forty is the heir to a self-care business started by his wealthy parents, who launched the grocery store Anavrin when he and Love were young.
Their parents elected to cover up the death to protect Forty, who grew up with severe unresolved trauma and developed an addiction to alcohol and drugs.
Forty begins dating a woman named Amy Adam (Joe's ex Candace under an alias), who introduces him to Beck's posthumous memoir and encourages him to adapt it into a screenplay.
Forty later takes LSD (which he also gives to Joe) to enhance his creative process, and deduces that Beck was murdered not by her therapist (as is written in the book) but her ex-boyfriend.
However, as he prepares to execute Joe at gunpoint, Forty is shot dead by police officer David Fincher, who followed Ellie to the scene.
Candace later finds the storage unit where Joe keeps a large glass cage and traps him inside with the corpse of his landlord, Delilah.
Sherry Conrad (Shalita Grant; season 3) is a locally famous "momfluencer," admired by her social media followers for her well-crafted persona.
Cary Conrad (Travis Van Winkle; season 3) is a wealthy, charismatic, and self-proclaimed founder who runs his own supplement company.
She is the estranged daughter of Tom Lockwood, a powerful activist investor with whom she cut ties because of the harm his business dealings have done to the world.
Kate begins the fourth season in a relationship with Malcolm Harding, an obnoxious professor at the college where Joe teaches under his "Jonathan Moore" identity.
Joe tells her his real name, and the two move back to New York City, where Kate takes over her father's company and reshapes it to have a more philanthropic intent.
Kate, Joe, and her family all try to save her from marrying Adam, but he isolates Phoebe telling her they don't care about her happiness and that he loves her.
Joe later learns that Nadia and Malcolm were in a sexual relationship, and retrieves a letter she wrote him from his apartment to avoid the scandal from going public.
Nadia begins dating her classmate Edward, with whom she often butts heads academically, and the two attend one of Kate's gallery auctions where they are surprised to see Joe.
Rhys Montrose (Ed Speleers; season 4),[14] is an author and aspiring mayor of London whose memoir about his experiences in prison lifted him out of poverty.
Upon his kidnapping and imprisonment of Marienne Bellamy, Joe suffered a psychotic break that caused a rift in his identity, leading to recurring hallucinations of Rhys as a manifestation of his repressed, murderous impulses.
Adam (Lukas Gage; season 4)[15] is an American playboy who hails from a wealthy family and owns Sundry House, an elite London social club.
He is dating Lady Phoebe and has a strained relationship with his father, who he typically consults to bail him out of debt from his failed business ventures.
Adam eventually proposes to Lady Phoebe despite being unfaithful to her, hoping her family wealth will free him from his mounting debts, and furthermore help Sundry House expand into a franchise.
Phoebe rejects his proposal upon learning of his intentions from an obsessed fan who briefly kidnaps her, but suffers a downward spiral of PTSD in the following days and returns to Adam for solace.