A masterclass in urgent historical filmmaking by National Film Board veteran Robin Spry (One Man), Action: The October Crisis of 1970 is a bracing portrait, expertly synthesizing a dizzying, watershed moment through archival material, news reports, and first-hand, on-the-ground footage. In league with the great political documentaries of the ‘60s and ‘70s – and complemented here by its companion film, Reaction: A Portrait of a Society in Crisis – Action remains a riveting account of the upheaval that shook Canada to its very core.