How many movies have Per Wahlöö and Tove Lamm Stråhle collaborated on?

They have worked on 4 movies together! Their first movie together was Beck 41 - Death in Samarra (2021) while their highest rated movie together was Beck 46 - The Crying Cop (2022). They have not worked together since Beck 46 - The Crying Cop (2022). They are most known for their mystery films together.