The Professor
- Episode aired Oct 31, 1977
![Barry Foster in Van der Valk (1972)](https://m.media-amazon.com/images/M/MV5BYzRhNzIyZjktMWE5Mi00MTFjLTg3ZDEtMDNmYTJjYmQ3MTAwXkEyXkFqcGdeQXVyMjExMjk0ODk@._V1_QL75_UY281_CR6,0,190,281_.jpg)
Van der Valk investigates the murder of a married university professor who used a dual identity while having affairs with his students.Van der Valk investigates the murder of a married university professor who used a dual identity while having affairs with his students.Van der Valk investigates the murder of a married university professor who used a dual identity while having affairs with his students.