How Watson learned the trick
- annos singulos: 1970
- Patriam: Germany
- genus: Mystery, Comedy, History
- Studio: Universität Bonn
- keyword: amateur detective, detective story, based on short story, holmes/watson, detective with humor, detective comedy, sherlock holmes, bantering relationship
- Director: Stefanie Hosenfeld
- cast: Jan Krolikowski, Dorian Lummel
