Aktenzeichen XY… ungelöst(1967)

Aktenzeichen XY… ungelöst is a German crime documentary series that premiered on ZDF in October 1967. The show reconstructs unsolved cases and appeals to viewers for information that might help solve them. From its inception through 2003, it was produced in partnership with Austrian and Swiss public broadcasters. The format proved so effective that it inspired international adaptations, including the BBC's Crimewatch, the Dutch series Opsporing Verzocht, and America's Most Wanted. Decades on, Aktenzeichen XY remains a landmark program in European television, blending investigative journalism with public participation to crack cold cases.