A plane blown from the sky, 52 victims, four suspects — one investigation.   

Exploding mid-air on July 8, 1965, Canadian Pacific Flight 21 plummeted into the woods in the B.C. Interior, killing all 52 people aboard. While the investigation determined a bomb brought down the passenger plane — and four suspects were at the top of the list — no charges were laid. 

Hanomansing and Wagstaffe uncover the largest unsolved murder on Canadian soil. (6x40 min episodes)