It's been a three year wait, but ITV's Amsterdam-set crime drama Van der Valk is finally back on our screens tonight for its fourth season. The plot follows Commissaris Piet Van der Valk and his team in the National Police Force's major crimes division in the Dutch capital city, with season 4 focusing on some of their toughest cases yet. Advertisement AdvertisementAdvertisement AdvertisementSpeaking to Radio Times, Warren stated: "That's a real shock for Van der Valk. Advertisement AdvertisementAdvertisement AdvertisementThat does mean that there are fan reviews of the season already (via Rotten Tomatoes), with one reading: "The original Van Der Valk was one of the best and most popular British detective series of the 1970s... Van der Valk returns to ITV1 tonight and streams on ITVX.