Chief Inspector Derrick solves crimes in Germany in an hour each. I remember enjoying this series greatly growing up in India, most because the series always brought closure each episode, and never dragged out like most other Indian detective series. Often focusing on social, psychological, or 'why did he do it' kind of themes rather than your typical whodunnit, I have fond memories of Derrick. Horst Tappert has a commanding presence as Derrick, and together with Harry and Berger (I've always thought three was too small a team) gets the criminal in all the episodes I saw. 'Harry, Get the car.' is a line that comes immediately to mind when I think about the series.
Derrick remains my favorite long running detective series, one of the several out of Germany we had a chance to see on Indian Television.