"An extremely important, deeply fascinating political film...from Argentina, Los Traidores follows the rise to power of a leftist labor union leader and his consequent betrayal of his comrades. Dramatically gripping and politically coherent, the fictionalized story carries a tremendous weight of ideology without ever becoming didactic or preachy. In the ongoing search for effective political film forms, Los Traidores is of utmost interest." (City Film Clips, Michael Goodwin, editor). Los Traidores was produced and directed in 1973 by the Grupo Cine de la Base, a collective of filmmakers, actors, factory workers and students from different sectors of the revolutionary Peronist or militant Left.