A German soldier dies silently as a World War II spy trained near Oshawa quickly and efficiently slits his throat.

A trainee is killed while crawling under barbed wire during a live ammunition exercise.

Recreated by a Canadian cast, such scenes — which viewers can see July 14 at 9 p.m. EST, July 15 at 3 p.m. or July 19 at 7 p.m. EST EST when History channel airs Camp X: Secret Agent School — echo the grim realities of agents who risked their lives while preparing to destroy enemy power plants and bridges.