Veronica debates coming clean to Nicole. Veronica’s fidelity is tested. Veronica and Keith discover they aren’t the only ones who believe they’ve found the bomber. A surprising potential client tries to hire Mars Investigations.

Veronica and Keith follow a new lead, and discover another victim. Matty follows her own instincts, landing herself dangerously close to a killer. Veronica has a tragic epiphany as the clock is ticking.

Wallace's new girlfriend Jane enlists Veronica's help when her older sister Heidi appears to be a "runaway bride," but the clues suggest something possibly more disturbing happened on the way to the altar. Meanwhile, Keith and Veronica decide that they have no choice but to go to Sheriff Lamb with the evidence they've uncovered about the bus crash. Later, Kendall has a tempting offer for Aaron Echolls.

After being hired by hip-hop heavyweight Percy "Bone" Hamilton to find his kidnapped daughter, Veronica and Keith look to the music mogul's long list of enemies, family members and the girl's Neptune High social circle for clues on her whereabouts. Meanwhile, following Lynn Echolls' apparent suicide, Logan cynically endures his father Aaron's effusive displays of grief as they prepare for her memorial ceremony.

While dealing with her own feelings of jealousy regarding Duncan, Veronica helps a young woman who believes that her new fiancée is secretly after her fortune by sifting through his background and even posing as a sexy, available coed to entrap the guy.

Deciding to give Jackie the benefit of the doubt since she's dating Wallace, Veronica tries to help Jackie determine who stole her credit card, leading Veronica to appear on a psychic's community access show to pursue a lead. Meanwhile, Wallace confronts his mother Alicia about who his real father is. Later, Veronica learns of a voice mail recording from one of the students that died, made at the moment the bus crash.

Veronica doesn't believe the evidence adds up against Weevil, who has confessed to stealing credit card applications from Logan's family, and launches an investigation to help her new ally. Meanwhile, after joining Ms. Mallory Dent's newspaper class, Veronica clashes with socialite Caitlin Ford, Logan's bombshell girlfriend, but is intrigued by the attention shown to her by another wealthy student, Troy Vandegraff, a friend of ex-boyfriend Duncan. Later, Veronica learns that Lilly got a ticket driving her car on the day she died -- two hours after her supposed time of death.

Wallace's hopes of escaping his trouble in Chicago are dashed when Rashard's uncle accuses him in the press of a hit and run. Meanwhile, Weevil has Veronica bug a church confessional to smoke out the traitor in his bike gang.

Veronica's detective prowess is again used on campus when Piz's football friend loses the team playbook and Veronica must get it back before the game. The Dean threatens to expel Veronica if she doesn't reveal the source of her newspaper article. Meanwhile, Keith hires Weevil to work in the office, and Logan's antics catch up with him.

Keith and Veronica are hired to help find the missing grand-daughter of the founder of Hearst College, whose swing vote could spell the end of fraternities and sororities at Hearst. Meanwhile, Logan fears for Veronica's safety as she gets closer to the truth regarding the campus rapes.

Veronica is hired to find out who slipped a classmate a drug causing her to have a miscarriage against her will, but is distracted by Logan who admits to sleeping with Madison Sinclair. Meanwhile, Keith helps Mindy O'Dell when her ex-husband breaks into their house.

With only a commonplace name, an old address and dim memories as leads, Veronica and Wallace attempt to help classmate Justin Smith find his father John, who disappeared 10 years earlier. Meanwhile, as Veronica faces some complicated feelings towards ex-boyfriend Duncan and new romantic interest Troy, guidance counselor Rebecca James calls Keith to the school to discuss the recent, dramatic changes in his daughter's life. Later, Duncan struggles with ways to cope with his sister's death as the anniversary of her murder approaches.

Veronica becomes suspicious when a young pregnant woman who lives in their apartment complex with her volatile boyfriend suddenly disappears; fearing the worst, Keith steps in to help his daughter investigate this case for the girl's estranged parents. Meanwhile, Logan and Weevil get thrown into detention together after arguing with a teacher, leading the rivals to discover some surprising things in common. Later, while working on an alumni photo project in her journalism class, Veronica is shocked to discover in the '79 yearbook that her mother and Jake Kane were high-school sweethearts.

The wealthy parents of a Neptune High senior hire Keith and Veronica to investigate a cult-like group and its charismatic leader after their son Casey moves out to live on the collective farm. Meanwhile, Veronica attempts to get to the bottom of Abel Koontz' claim that her real father is Jake Kane.

When a private website for Neptune High's gay students is hacked, and the members blackmailed, Veronica finds it difficult to track down the culprit when the victims want to remain anonymous. Meanwhile, Hannah finds out Logan's true intentions, and Keith believes he has found an alibi for Terrence.

What promises to be a simple case of finding out who ran over a classmate's dog turns into a startling revelation when new secrets about the bus crash come pouring out and Veronica finds herself again revisiting Lilly's murder case. Meanwhile, Wallace and Jackie try to turn their relationship around the corner, and the PCHers turn to Weevil for protection from the Fitzpatricks.

Logan gets a big surprise when he hires Veronica to find the source of his missing inheritance, which escalates from weird to worse. Meanwhile, Dick's fraternity asks Veronica to prove their innocence in the campus rapes, and Keith helps an old acquaintance prove her husband is cheating.

With Keith acting-sheriff, Veronica goes solo on a case involving a local restaurant whose owners are the targets of hate crimes. Meanwhile, Keith is disturbed by the lack of professionalism in his deputies when he orders them to fine bars serving alcohol to underage patrons. Logan throws a birthday party for Parker, and Piz decides to finally confront Veronica about his feelings.

Panic spreads through Neptune when a bomb goes off during spring break. Veronica and Keith are hired by the wealthy family of one victim injured in the bombing to find out who is responsible.

Veronica and Keith’s client, Daniel Maloof, makes a shocking confession. Sheriff Langdon closes in on her top suspect. Veronica and Matty join forces, just as the whole investigation is flipped on its head.

Following an emotional reunion with her mother, Veronica is hired to track down Neptune High's beloved mascot, Polly the Parrot, which was apparently kidnapped by a rival school on the eve of a big basketball game. Meanwhile, with her suspicions about the Kane family rekindled, Veronica attempts to gain access to her father's original interrogation tapes. Later, Veronica's relationship with Deputy Leo heats up, as does Meg's relationship with Duncan.

After tragedy strikes Neptune, Calif. and the local sheriff rushes to judgment, an emotional Veronica attempts to help a grieving family member rule out suicide as a contributing cause in the calamity. Meanwhile, Wallace offers to help transfer student Jackie Cook, the fiery, flirty daughter of professional baseball player Terrence Cook, track down the person who damaged her car in the school lot. Later, mayoral candidate Woody Goodman asks Keith to consider running for sheriff.

Veronica helps Keith determine who is haunting a school bus crash victim's parents, currently embroiled in a suit against the school district for negligence.Meanwhile, after Logan asks for help fighting the murder charge against him, Veronica stumbles

While accompanying Wallace to Hearst College, she runs into her ex, Troy Vandergraff, who enlists her help when he is accused of date rape. Meanwhile, Keith helps Cliff with a personal problem involving a prostitute, and Logan makes a decision regarding his relationship with Hannah.

When the illegal casino Veronica frequents is robbed, she must track down the thief to recover the necklace Lilly gave her years before. Meanwhile, Dean O'Dell's stepson is dying of cancer and needs Keith to track down his biological father for a transplant (with Cliff's help), and Wallace fears he may flunk out of his most important class.