'The Irrational' Season 2 Cast Revealed - A New Star Joins 5 Returning Castmates on NBC Show

The Irrational is returning for a second season on NBC this fall, and we’ve got the details about the cast list!

After premiering in 2023 and becoming a fan-favorite, the series was renewed for a second season.

Here’s a synopsis of the show: “The Irrational follows world-renowned professor of behavioral science Alec Mercer (Martin) as he lends his unique expertise to high-stakes cases and mysteries. His insight and unconventional approach to understanding human behavior lead him to work alongside varying clients ranging from the FBI to everyday people caught in perplexing situations desperate for answers. With the help of his trusted team and social-science experiments, Alec solves crimes and uncovers the truth to answer intriguing, and irrational, questions.”

When the show returns for the second season, it will do so with five returning cast members. Recently, another star was confirmed to join the cast.

Scroll through the slideshow to see who will be back for the second season of The Irrational…