Add one more DC Comics supervillain to Arrow as a report states Robert Knepper has been cast as William Tockman aka The Clock King.
TV Line has it that in Arrow, The Clock King gets his name from planning crimes with the utmost precision and down to the last second.
Robert Knepper is known for roles in Prison Break, Heroes, Stargate Universe, Percy Jackson: Sea of Monsters, was recently featured on The Black List and can been seen in Mob City.
Knepper is set to appear on episode 14 of Arrow which will also guest-star Alex Kingston.
Arrow returns Wednesday, January 15th at 8pm ET on the CW with episode 10, "Blast Radius."