Bolivar Trask

Played by Peter Dinklage

Bolivar Trask is a scientist and defense contractor who developed the Sentinels, adaptive robotic hunters originally designed to identify and eliminate mutants, using data harvested from captured mutant test subjects. His assassination by a mutant seeking to prevent the Sentinel program set off a chain of events that convinced the government to fund the very weapons his death was meant to stop. Read more →

First turns up in X-Men: Days of Future Past.