Conscience - S5.E19

Dashwood is moaning because Greig is playing his clarinet in the office. Roach is having a drink with a married woman and after she leaves, he recognises a man whose car has broken down as the ex-commander of the murder squad who roach is convinced convicted the wrong man. Meanwhile back at the station Dashwood discovers that Roach is due in court in the morning and approx 40 witnesses need to be warned.