Derrick is a German crime television series produced between 1974 and 1998, starring Horst Tappert as Detective Chief Inspector (Kriminaloberinspektor) Stephan Derrick, and Fritz Wepper as Detective Sergeant (Kriminalhauptmeister) Harry Klein, his loyal assistant. They solve murder cases in Munich and surroundings. It was produced by Telenova Film und Fernsehproduktion in association with ZDF, ORF and SRG.

Fritz Wepper was a German film and television actor. He is best known for his role as Inspector Harry Klein in the long-running crime series Derrick (1974–1998). Wepper is also remembered for his roles in the films Cabaret (1972) and The Bridge (1959) and as Mayor Wöller in the TV series Um Himmels Willen (2002–2021).