Skip to content
Streambay
The Irrational poster
TV series

The Irrational

Latest episode

S2 E18 · The Exchange

About The Irrational

The Irrational is a drama and crime TV series that premiered on NBC on September 25, 2023. It has 2 seasons and 29 episodes so far and was canceled. The latest episode, Season 2 Episode 18 "The Exchange", aired on March 25, 2025.

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.

  • Drama
  • Crime

Last updated

Episodes

29 episodes · 2 seasons

Season 1

2023 · 11 episodes · Last episode: 2 years ago

The Irrational Season 1 release dates →
  1. The Irrational S1 E11 still E11

    11. Reciprocity

    Finale

    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.

  2. The Irrational S1 E10 still E10

    10. Bombshell

    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.

  3. The Irrational S1 E9 still E9

    9. Cheating Life

    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.

  4. The Irrational S1 E8 still E8

    8. Scorched Earth

    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.

  5. The Irrational S1 E7 still E7

    7. The Real Deal

    Mid-season finale

    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.

  6. The Irrational S1 E6 still E6

    6. Point and Shoot

    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.

  7. The Irrational S1 E5 still E5

    5. Lucky Charms

    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.

  8. The Irrational S1 E4 still E4

    4. Zero Sum

    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.

  9. The Irrational S1 E3 still E3

    3. The Barnum Effect

    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.

  10. The Irrational S1 E2 still E2

    2. Dead Woman Walking

    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.

  11. The Irrational S1 E1 still E1

    1. Pilot

    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.

Season 2

2024 · 18 episodes · Last episode: 1 year ago

The Irrational Season 2 release dates →
  1. The Irrational S2 E18 still E18

    18. The Exchange

    Finale

    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.

  2. The Irrational S2 E17 still E17

    17. Suddenly, Alec

    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.

  3. The Irrational S2 E16 still E16

    16. The Overview Effect

    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.

  4. The Irrational S2 E15 still E15

    15. Conversation Games

    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.

  5. The Irrational S2 E14 still E14

    14. The Milgram Experiment

    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.

  6. The Irrational S2 E13 still E13

    13. Murder, She Rode

    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.

  7. The Irrational S2 E12 still E12

    12. Straight From the Heart

    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

  8. The Irrational S2 E11 still E11

    11. Ghost Ship

    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

  9. The Irrational S2 E10 still E10

    10. Now You Don't

    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.

  10. The Irrational S2 E9 still E9

    9. Another Man's Treasure

    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.

  11. The Irrational S2 E8 still E8

    8. Lost Souls

    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.

  12. The Irrational S2 E7 still E7

    7. Stan by Me

    Mid-season finale

    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.

  13. The Irrational S2 E6 still E6

    6. The Wrong Side of Maybe

    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.

  14. The Irrational S2 E5 still E5

    5. Anatomy of a Fall

    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

  15. The Irrational S2 E4 still E4

    4. Formal Ties

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

  16. The Irrational S2 E3 still E3

    3. Bad Blood

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

  17. The Irrational S2 E2 still E2

    2. A Kick in the Teeth

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

  18. The Irrational S2 E1 still E1

    1. Collateral Damage

    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.

Cast & crew

Created by Arika Lisanne Mittman

  • Caleb Ruminer

    Caleb Ruminer

    Dylan Hayes

  • Kaj-Erik Eriksen

    Kaj-Erik Eriksen

    Ray

  • Sara Canning

    Sara Canning

    DA Elise Bowen

  • Teach Grant

    Teach Grant

    Clay

  • Dalmar Abuzeid

    Dalmar Abuzeid

    Young Alec Mercer

  • Ben Cotton

    Ben Cotton

    Wes Banning

  • Lauren Holly

    Lauren Holly

    Mayor

  • Billy Christos Jr.

    Billy Christos Jr.

    Child in Bowling Alley

  • Vincent Delorme

    Frank

  • Cameron McDonald

    Cameron McDonald

    Agent Barry Guilfoyle

  • Kaja Jean

    Kaja Jean

    Woman

  • Leo Chiang

    Leo Chiang

    SWAT Officer

  • Jesse Peachment

    Frat Guy

  • Ash Lee

    Ash Lee

    Det. Bryan Chou

  • Jess Smith

    Det. Erin Wolcott

  • Malaya Valenzuela

    Malaya Valenzuela

    Student #1

The Irrational FAQ

Will there be new episodes of The Irrational?

The Irrational has been canceled, so no new episodes are scheduled. The final episode aired on March 25, 2025.

When did the latest episode of The Irrational come out?

The most recent episode of The Irrational, Season 2 Episode 18 "The Exchange", aired on March 25, 2025.

How many seasons of The Irrational are there?

The Irrational has 2 seasons with 29 episodes in total.

When did The Irrational first air?

The Irrational first aired on NBC on September 25, 2023.

How do I get notified when new episodes of The Irrational are released?

Download the Streambay app, follow The Irrational, and you'll get a push notification the moment each new episode is released.

More like The Irrational

  • Law & Order: Special Victims Unit poster

    8.0

    S28 · E4 1 week ago

    Law & Order: Special Victims Unit

    Synopsis: In the criminal justice system, sexually-based offenses are considered especially heinous. In New York City, the dedicated detectives who investigate these vicious felonies are members of an elite squad known as the Special Victims Unit. These are their stories.

  • Law & Order poster

    7.3

    S26 · E4 1 week ago

    Law & Order

    Synopsis: In cases ripped from the headlines, police investigate serious and often deadly crimes, weighing the evidence and questioning the suspects until someone is taken into custody. The district attorney's office then builds a case to convict the perpetrator by proving the person guilty beyond a reasonable doubt. Working together, these expert teams navigate all sides of the complex criminal justice system to make New York a safer place.

  • The Mentalist poster

    8.4

    S7 · E13 11 years ago

    The Mentalist

    Synopsis: Patrick Jane, a former celebrity psychic medium, uses his razor sharp skills of observation and expertise at "reading" people to solve serious crimes with the California Bureau of Investigation.

  • NCIS poster

    7.6

    S24 · E5 5 days ago

    NCIS

    Synopsis: From murder and espionage to terrorism and stolen submarines, a team of special agents investigates any crime that has any connection to Navy and Marine Corps personnel, regardless of rank or position.

  • C.I.D. poster

    5.7

    S2 · E104 10 months ago

    C.I.D.

    Synopsis: A team of dedicated men and women in the Crime Investigation Department will risk everything to solve Mumbai's toughest, most complicated crimes.

  • MobLand poster

    8.5

    S2 · E8 2 days ago

    MobLand

    Synopsis: Two mob families clash in a war that threatens to topple empires and lives.

  • CSI: Crime Scene Investigation poster

    7.6

    S15 · E18 11 years ago

    CSI: Crime Scene Investigation

    Synopsis: A Las Vegas team of forensic investigators are trained to solve criminal cases by scouring the crime scene, collecting irrefutable evidence and finding the missing pieces that solve the mystery.

  • Criminal Minds poster

    8.3

    S19 · E10 3 months ago

    Criminal Minds

    Synopsis: An elite team of FBI profilers analyze the country's most twisted criminal minds, anticipating their next moves before they strike again. The Behavioral Analysis Unit's most experienced agent is David Rossi, a founding member of the BAU who returns to help the team solve new cases.

  • Slow Horses poster

    8.1

    S6 · E6 2 weeks ago

    Slow Horses

    Synopsis: Follow a dysfunctional team of MI5 agents—and their obnoxious boss, the notorious Jackson Lamb—as they navigate the espionage world's smoke and mirrors to defend England from sinister forces.

  • The Rookie poster

    8.5

    S8 · E18 6 months ago

    The Rookie

    Synopsis: Starting over isn't easy, especially for small-town guy John Nolan who, after a life-altering incident, is pursuing his dream of being an LAPD officer. As the force's oldest rookie, he's met with skepticism from some higher-ups who see him as just a walking midlife crisis.

  • Breaking Bad poster

    9.0

    S5 · E16 13 years ago

    Breaking Bad

    Synopsis: Walter White, a New Mexico chemistry teacher, is diagnosed with Stage III cancer and given a prognosis of only two years left to live. He becomes filled with a sense of fearlessness and an unrelenting desire to secure his family's financial future at any cost as he enters the dangerous world of drugs and crime.

  • CSI: Miami poster

    7.7

    S10 · E19 14 years ago

    CSI: Miami

    Synopsis: The show follows Crime Scene Investigators working for the Miami-Dade Police Department as they use physical evidence, similar to their Las Vegas counterparts, to solve grisly murders. The series mixes deduction, gritty subject matter, and character-driven drama in the same vein as the original series in the CSI franchise, except that the Miami CSIs are cops first, scientists second.

Never miss The Irrational.

Download Streambay and follow The Irrational. We’ll notify you the moment a new episode is released. It’s free, with no sign-up and no personal information required.

Coming soon to App Store Get it on Google Play
The Irrational Get new episode alerts Get alerts