BlacKkKlansman, Channel 4, 9pm Spike Lee’s 2018 film is based on a 2014 memoir by retired Colorado Springs police officer Ron Stallworth, the first African-American on the city’s force, in which he tells how he infiltrated the Ku Klux Klan in the late 1970s. Hence the spellcheck-taxing title. Unsurprisingly given the premise, Lee’s adaptation is a black comedy. Stallworth is played by future Tenet star John David Washington. We first meet him in the early 1970s as he’s reassigned from menial duties in the records department to a job keeping tabs on civil rights leader Stokely Carmichael while he’s in town. This brings him into contact with Patrice Dumas (Laura Harrier), a young black activist, and the two are soon an item though understandably Stallworth keeps the fact that he’s a policeman under wraps.