In the film, Chris is found trapped in a maximum security cell after his unit's attempt to control the T-virus in Los Angeles goes haywire and the survivors who find him believe him to be a prisoner. He is reunited with his sister Claire, who cannot remember him due to memory damage caused by an Umbrella mind-control device. He, Alice and Claire eventually defeat Albert Wesker and rescue imprisoned survivors being used for Umbrella's experiments. Miller said he prepared for the role by searching for images and videos of Chris in the Internet, as well as doing cardio for endurance.[23