After the chaotic season finale of Casualty (8.10pm), we have the final instalment of Wallander. Anna Westin, a troubled childhood friend of Wallander's daughter, visits his house late at night begging for his help - but disappears soon afterwards. Meanwhile, an elderly woman's burned body is found in a shallow grave, and when the detective discovers a connection between Anna and the murder victim, he fears she could be the next target of a dangerous religious fanatic. Linda returns to Ystad to help with the investigation, and has some life-changing news for her father. Guest starring Lindsay Duncan (Rome), with Kenneth Branagh and Jeany Spark.