Shadow (Polish: Cień) is a 1956 Polish film directed by Jerzy Kawalerowicz. It was entered into the 1956 Cannes Film Festival.
The plot involves a Rashōmon-like investigation into the life of a man who has been found dead after having been hurled from a train. As security agents, police and a medical examiner piece together his identity, three accounts emerge: one set during World War II, one in the immediate aftermath of the war, and one in contemporary Poland. In each account, the victim seems to have been a mysterious, ambiguous presence, of shifting loyalties and suspicious connections, who set himself against the powers that be.
Critics attacked the film for its depiction of a world rife with secret agents and hidden enemies—a favorite Stalinist theme— while the film seems, rather, to demonstrate how heroism and villainy are often matters of point-of-view and timing.