But thanks to Cooper's convincing dual performance, the film is watchable. Well, the only thing worth watching is Cooper. It's a testament to his talent--which we'll see more of in Captain America: The First Avenger (July 22, as arms inventor Howard Stark), My Week with Marilyn (November 4, as photographer Milton Greene), Abraham Lincoln: Vampire Hunter (2012, as Henry Sturgess)--that this film functions at all.
The way Tamahori glamorizes violence here is a far cry from the honest grit of his breakout 1994 New Zealand drama Once Were Warriors.Devil's Double won't necessarily garner Cooper an Oscar nomination, but it's putting him in line. Cooper agreed with Tamahori that the film "shouldn't be a detailed, accurate biographical account of these people or this moment in history." It certainly won't be remembered as such when it hits theaters July 29.