Aktenzeichen XY … ungelöst (
German for "Case number XY … Unsolved") is an interactive
German television programme first broadcast on 20 October 1967 on
ZDF. Created by
Eduard Zimmermann, it aims to combat and solve crimes. The programme is currently presented by
Rudi Cerne. It airs monthly, with 12 episodes in a year, on Wednesday at 8:15 PM.