In The Irrational Season 2 Episode 13, "Murder She Rode," Alec and Phoebe investigate after a champion horse throws and kills its rider, leading them to try and save the horse from being euthanized.

Their investigation reveals that the incident is more than just a tragic accident.

The case becomes personal for Phoebe, requiring her to confront her past anxieties related to horseback riding.

Meanwhile, Marisa faces a difficult situation involving her son, Cam, though this subplot remains less captivating.

The team works to uncover the truth behind the horse's behavior, revealing a scheme to defraud horse breeders.