The Little Things

After five-year-old Ethan Heller is abducted in broad daylight, the team gets involved and soon begins to suspect that Ethan's father knows more than he's saying. While looking into Jim Heller, the team learns that his company, Genacore, had been pushing the wonder-drug Elixair and Heller had learned that the drug was dangerous to children. Danny becomes suspicious of Martin as his behavior becomes increasingly erratic, which includes barking at the mother of the missing boy and putting both himself, the boy and Danny in danger. He confronts Martin about it in the end of the episode.