Every season of The Irrational ever, ranked from best to worst by thousands of votes from fans of the show. The best seasons of The Irrational!

Professor of behavioral science Alec Mercer suspects there's more to the story when he is called upon to investigate the murder of a fashion influencer whose boyfriend has confessed.

Pilot

Prof. Mercer is approached by old friend CJ, a prominent investigative journalist, who asks for his help after she’s poisoned with a rare and deadly nerve agent. With time running out, Mercer pieces together scant clues.

Dead Woman Walking

After a passenger plane crashes into the Potomac River, suspicions focus immediately on the pilot. Prof. Mercer and the team are asked to investigate the pilot’s personal motivations and piece together clues in the hopes of revealing the truth.

The Barnum Effect

Alec and the team take on a kidnapping case at the request of a desperate father. Their investigation is hampered by a complicated family dynamic that slowly reveals everyone's hidden motivations.

Zero Sum

Alec and the team head to Las Vegas to help Camille, a former colleague turned expert poker player who's been lured into danger. They must take some risks to solve a gambling mystery before Camille gets hurt. Marisa makes a significant discovery.

Lucky Charms

Alec agrees to testify as an expert witness in a wrongful death trial for a friend of Kylie's. As he faces an old nemesis, he discovers competing emotions around an accidental shooting. Marisa reaches a decision about the bombing investigation.

Point and Shoot

Alec's first date with Rose turns into a 24-hour excursion when they find themselves taking on an investigation involving a forged masterpiece. Marisa and Kylie attempt to revive their friendship, which has faltered since Alec and Marisa's divorce.

The Real Deal

Alec takes a case involving a young burn victim and arson that forces him to confront some trauma from his past. Phoebe and Rizwan compete for an important research grant.

Scorched Earth

After witnessing a hit and run during a friend's livestream, Alec and Kylie aim to prove it wasn't an accident. As Marisa and Jace continue their investigation into the church bombing, they set their sights on a prominent senator.

Cheating Life

Alec and his team come face to face with the man who was put away for the church bombing 20 years earlier. Marisa and Kylie work together to save Alec, Phoebe and Rizwan. Jace makes a critical break in the case that changes everything.

Bombshell

Alec and Marisa are close to finding the culprit of the church bombing. Kylie gets an interview with the FBI, but is pulled into the investigation. Rose tracks down a witness. Phoebe and Rizwan make a discovery that sheds light on the truth.

Reciprocity

When Rose goes missing, Alec quickly discovers this is no ordinary kidnapping. While Rose plays a dangerous game to stall for time, Alec takes matters into his own hands to find her.

Collateral Damage

The FBI needs Alec and his team to help stop a serial killer terrorizing the suburbs.

A Kick in the Teeth

Alex investigates the death of a rising star on Wall Street who was killed during her hockey game.

Bad Blood

Alec and Marisa attend a wedding inside a foreign embassy that turns into a murder investigation.

Formal Ties

Simon's mother asks Alec to help stop a suicide contagion when a third student death strikes the campus. Alex asks Marisa to help when he thinks there might be more to the case. Phoebe struggles with her next career move

Anatomy of a Fall

Alec and the team work to prevent a looming train disaster.  Phoebe, Simon and Rizwan struggle to figure out the new power dynamics between them.

The Wrong Side of Maybe

Alec enters the world of K-Pop fandom when a superfan is murdered, and the only suspect is the pop star the fan idolizes.  Alec and Rose dig beneath the surface to uncover what happened and, in the process, he uncovers more about her past.

Stan by Me

When an acclaimed tennis player goes missing in a remote forest, Alec is called to help find her and bring her to safety. However, a medical emergency threatens to sideline Alec, leaving Marisa and Rose to race against time and rescue the woman.

Lost Souls

Alec and Marisa investigate a museum heist and a curator and his son might hold the key; the case raises ethical questions about the controversial practice of buying and selling cultural artifacts, which brings old memories for Marisa.

Another Man's Treasure

Alec brings Rose on a date to a magic club he frequents where a friend is the headliner; the evening turns deadly when an audience volunteer is inexplicably killed onstage, and seemingly by magic.

Now You Don't

Alec and Marisa investigate a mysterious ghost ship that has washed up on the shores of his hometown. This forces him to revisit his past and spend time with his father with whom he has a fraught and complicated relationship

Ghost Ship

Renee seeks Alec's help after she has a dream containing details about a murder that actually happened. The case grows more intriguing when they realize the victim was Renee's heart transplant donor. Marisa is surprised by a visitor from her past

Straight From the Heart

After a champion horse throws and kills his rider, Alec and Phoebe are called upon to save the horse from being euthanized. Their investigation reveals what happened isn’t at all as it appears.

Murder, She Rode

Alec helps Rose when an attorney general is threatened by a scandalous deep fake video that puts lives in danger. The head of Rose’s firm arrives from Europe and gets entangled in their case work, leading Alec to do an experiment.

The Milgram Experiment

When Kylie and Marisa find evidence that a tech billionaire may be a serial killer, Alec quickly determines the only way to prove the killer’s guilt is for Alec to extract a confession, which leads into a dangerous game of cat and mouse.

Conversation Games

With an astronaut trapped in space, Alec is tapped to evaluate whether the pair of astronauts assigned to rescue them—a married couple—can safely complete the mission, until an accident during a training exercise puts the mission at risk.

The Overview Effect

In order to solve an actor's murder, Alec and Rose must go undercover to infiltrate a community theater production of "Little Shop of Horrors," but joining the cast may put them right in the killer's cross-hairs.

Suddenly, Alec

When Alec is recruited to assist with a multi-national prisoner exchange that has gone awry, he sees an opportunity to rescue a wrongfully imprisoned colleague. The case pulls Alec and Rose into the dangerous world of international espionage.

The Exchange

Alec Mercer is a world-renowned professor of behavioral psychology with a unique insight into human nature who lends his expertise to an array of high-stakes cases involving governments, corporations and law enforcement. However, he meets his match in a female domestic terror suspect who turns his world upside down.

The Best Seasons of The Irrational

The Best Seasons of The Irrational

Season 2

Season 1