[s1e1] The Boy On The Bridge -

(Luke Evans): A newspaper illustrator who assists Kreizler in gathering evidence.

(Douglas Smith & Matthew Shear): Detective brothers skilled in the new science of forensics who join the team. [S1E1] The Boy on the Bridge

(Brian Geraghty): The police commissioner who provides covert support for the investigation while trying to clean up police corruption. (Luke Evans): A newspaper illustrator who assists Kreizler

: Dr. Kreizler, an "alienist" (an early psychiatrist), believes a serial killer is at work. He conducts a parallel, covert investigation because the police have wrongfully charged a man just to close the case. : The mutilated body of a young boy

: The mutilated body of a young boy prostitute is discovered on the unfinished Williamsburg Bridge. The victim was found dressed as a girl, a detail that reminds psychologist Laszlo Kreizler of a previous unsolved murder of one of his former patients.