James Riordan is an American actor. He plays Franklin Werner in Boardwalk Empire. He is a Guest Star in the fourth season episode "New York Sour". He has also appeared in the series Damages, Law & Order and As the World Turns "White Collar" "All My Children" and the films Choose and Dark Horse. His Broadway credits include "The Elephant Man" "Jerusalem" "Noises Off" and "Dance of Death" Off-Broadway he was critically praised for his performances in Brian Friel's "LOVERS" and the long running hit "The Countess" in which he played the art and social critic John Ruskin. He has an MFA in acting from Temple University and attended the Julliard school.

He appears in Law & Order as "Miles Foster" and Law & Order Criminal Intent as "Ruben"

Plays "Spencer Landau" on Law & Order Special Victims Unit Season 15 "October Surprise"