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Is The Irrational New Tonight? (February 25, 2025)

Mercer and his team love a puzzle on NBC's The Irrational.

By Jessica White

Delivering a smash sophomore season, NBC's The Irrational delves into the mind-boggling world of behavioral science, with Alec Mercer (Jesse L. Martin) at the helm of some intense drama.

How to Watch

Watch The Irrational Tuesdays at 10/9c on NBC and next day on Peacock

As Mercer and his team unravel cases that often challenge the confines of conventional logic, fans have enjoyed growing closer to this whip-smart cast of characters. Not only have Mercer's personal and professional worlds collided on numerous occasions, but the endless rotation of cases he is dealt has kept him and his team on their toes this season.

"There are so many possibilities when it comes to just concentrating on how we think and how we behave," Martin told Collider. "Mental health is a big topic on everybody's platforms these days, and our show explores it, certainly in a scripted context, but in so many different ways with so many different people. The more interesting actors we get in, the more that behavior surfaces... There are so many places to get creative. There are so many stories that can get told when you're just talking about behavior, in general."

RELATED: Before The Irrational, Ron Canada Worked with Jesse L. Martin on Law & Order

Learn when and where to watch new episodes of The Irrational Season 2, below.

Alec Mercer (Jesse L. Martin) in Season 2 Episode 1 of The Irrational.

Is The Irrational new tonight, February 25, 2025?

Yes! 

The logline for this week's episode of The IrrationalSeason 2, Episode 15 ("Conversation Games") — reads: "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."

Alec Mercer and Morgan on The Irrational Episode 109

When do new episodes of The Irrational Season 2 air?

New episodes of The Irrational Season 2 air on Tuesdays at 10/9c on NBC. Catch up on the action right after new episodes of Night Court and Deal or No Deal Island.

Marisa Kylie and Rose all talk to alec in a hospital bed in The Irrational Season 2, Episode 9.

Where can I watch old episodes of The Irrational?

Every previously aired episode of The Irrational is available to stream on Peacock.

RELATED: Everything to Know About NBC's Drama The Irrational Starring Jesse L. Martin

"We are so lucky and privileged to have Jesse Martin playing the role of Alec," The Irrational showrunner Arika Lisanne Mittman told NBC Insider. "When I first wrote this character, there was a character I wrote on paper, and there's what Jesse brought to it, and those two things put together have just created magic, and I'm so grateful to have him. He's wonderful to work with. He's really a gift to all of us."