Eric Sacks
Eric Sacks is a character who appears in the rebooted Teenage Mutant Ninja Turtles (2014 film). He is portrayed by veteran film actor, William Fichtner.
Backstory and origin
Sacks was born on a military base in Okinawa, his father went to Vietnam and never returned. He was bullied and outcast until a local sensei took him under his wing and trained him in ninjitsu. His sensei was actually Oroku Saki, also known as The Shredder.
Films
In early May, William Fichtner was cast in the film as Eric Sacks who was said to have a lead role with iconic stature in the Turtles' mythology. He was meant to play The Shredder in early production, but for some unknown reason his role was not the same as Shredder. Instead, Tohoru Masamune was cast in the role of the Shredder instead while Fichtner's role as Sacks was a lieutenant role like Karai. Fichtner revealed in an interview that he has signed on for three TMNT films as Eric Sacks as well as the motion capturers for the turtles, Noel Fisher (Michelangelo), Alan Ritchson (Raphael), Jeremy Howard (Donatello) and Pete Ploszek (Leonardo).
Teenage Mutant Ninja Turtles (2014 film)
Eric Sacks was working along with Dr. O'Neil, April O'Neil's father on an experiment to do with alien mutagen; their test specimens were none other than Master Splinter and the turtles. Sacks was found out to be working for the Foot Clan by Dr. O'Neil and he torched the lab only to burn to death. April rescued the turtles and Splinter from the fire, while Sacks assumed they perished until April revealed she saved them. Sacks gave her a card in case she needed help finding them. April is captured by the turtles and taken to their sensei, Splinter who asks who she revealed their existence to.
April tells them she informed Sacks of their existence only for Splinter to worry because he is evil and works for the Shredder. While April and Splinter are talking, Sacks flies to a compound in an unknown place and reveals to Shredder the turtles are alive and that they possess the mutagen they are after and plan to capture the turtles. Sacks then walks with Saki to the upgraded robotic armor of Shredder's. Where Sacks explains his engineers have taken the armor to the next level. The card Sacks gave April is actually a tracking device revealing the location to the turtles lair and the Foot Clan launch an attack on the lair where the turtles and Splinter are gaining the upper hand till Shredder intervenes and beats Splinter to a critical pulp.
The Foot capture Leonardo, Donatello and Michelangelo while Raphael is presumed dead and the captured turtles are taken to Sacks Estate to be drained of the mutagen in their blood. Sacks walks in to see Michelangelo, Leonardo and Donatello in his lab where he is amazed at the size of them. Sacks explains his plan to release a toxic gas upon New York City, then enrich himself by selling the mutagen (which possesses healing properties) as the cure to the toxic gas, while Shredder and the Foot Clan will rule what is left of New York. April, Vern Fenwick and Raphael storm the estate and Eric Sacks leaves with the mutagen canister while Shredder fights Raphael. Shredder then leaves with Sacks and the turtles are in prusuit of them.
Sacks and Shredder go to Sacks Tower where the toxic poison is and they start the process only then April and Vern go to the lab where Sacks is and the turtles go after Shredder. While trying to shoot April and Vern, Sacks reveals that he killed April's father, Dr. O'Neil by shooting him. April pushes the steam valve button which distracts Sacks and Vern clocks him with a microscope, knocking him unconscious. At the end of the film, Shredder and presumably Sacks are arrested by the NYPD.
Teenage Mutant Ninja Turtles: Out of the Shadows
Sacks will return in the sequel film, Teenage Mutant Ninja Turtles: Out of the Shadows.
Video games
Although not the Shredder in the films, Fichtner still voiced Shredder in the 3DS version of the Teenage Mutant Ninja Turtles (2014 video game).
References
http://deadline.com/2013/05/teenage-mutant-ninja-turtles-adds-william-fichtner-494468/