Resident Evil Retribution - A kulisszák mögött (3) Evil-doer Captain Alexander Slater is an Umbrella executive and the overall quinary antagonist in Resident Evil: Extinction. He serves as the second in command of the Umbrella Science Division headed by Dr. Sam Isaacs and was in charge of the Umbrella North American laboratory in the wake of the global T-Virus outbreak. He was portrayed by Matthew Marsden. who also portrayed villains includes Jack Byron