In NYPD Blue (Pearl,8.30pm), it is easy to grow close to the realistically portrayed characters in this excellent police drama. The characters and the supporting cast are people nearly everyone knows. Real people experiencing the joys of relationships with family and friends and also with the problems in relationships, ageing parents and substance abuse that most of us can relate to. As we grow comfortable with the characters and get to know these fictional people they soon dissapear from our lives as people do in real life. In tonight's episode, Detective Sipowicz (Dennis Franz) and Simone (Jimmy Smits) are assigned to investigate a homicide at a bar. While interviewing a witness at a nearby hospital who was wounded in the attack, he describes how a passer-by was shot and killed in the aftermath. When the detectives remove the sheet covering the dead man, to their horror, it is someone they know. The news of the death sends the squad room into shock. Relationships also play a big part in the hilarious 1970s comedy Carwash (HBO, 9.30am) but on a more upbeat note. Shot during the tail-end of 'Blaxplotation' films in 1976, the setting is a downtown Los Angeles car wash and the weird and wonderful characters that either work there or come by for a wash and wax and some general abuse. The jokes fly fast and furious and depict the struggle 'the brothers' are experiencing in holding a job, a relationship or in just getting ahead in life. The film features a great soundtrack, funky clothes, outrageous afros and an all-star cast of black actors from the era, including Richard Pryor, Ivan Dixon (Hogan's Heroes ), Antonio Fargas (Huggy Bear from Starsy And Hutch ), the great comic Franklin Ajaye, Garrett Morris (Saturday Night Live ) as well as George Carlin. Tape this for the weekend. In 1976, Jack Nicholson was at the height of his powers having reached the pinnacle of his career the previous year in winning the Oscar for his role as the devious McMurphy in One Flew Over the Cuckoos Nest. The win was vindication for years of toiling in obscurity in B-movies and coming up empty in four previous Oscar nominations. Nicholson would follow Cuckoos Nest with The Missouri Breaks (Pearl, 12.25am), a film that bombed at the box office but was significant in portraying how violence was used to tame America's western states in the late 19th century. As Tom Logan, leader of a gang of horse thiefs, Nicholson is pursued by Lee Clayton (Marlon Brando), a 'regulator' or legalised killer, set to track down the surly gang. Directed by Arthur Hill (Warriors, 48 Hours ), the film features some excessive violence and even Brando in drag. As good as Back To The Future was, the same cannot be said of Back To The Future II (World, 9.30pm). Released four years after the original blockbuster, no sooner has Marty McFly (Michael J Fox) returned to 1985 when he is whisked off to 2015 by the the mad professor Christopher Lloyd. The charm that director Bob Zemeckis created with his look back into the 1950s fails to come across in the future. The best part comes when town bully Biff Tannen (Tom Wilson) borrows a sports almanac and then heads back to the 1950s to make himself rich. Elisabeth Shue co-stars. In CNN Presents . . . Breakthrough (CNN, 6pm), an AIDS cocktail developed by Taiwanese doctor David Ho and his US collegues is profiled. If given early enough after infection, the treatment has been shown to reduce the virus to undetectable levels in the blood of patients with HIV.