We don't have an overview translated in English.

The first episode explores the missed chances of Peter Sutcliffe’s early offending and presents evidence to show that his campaign of murder and mutilation may have started at least six years before his first acknowledged victim, with the killing of Mary Judge in Leeds in 1968. Among the casest explored in this episode are Judith Roberts, a schoolgirl killed in Staffordshire in 1972 and Carol Wilkinson, a bakery worker murdered in Bradford in 1977. Despite the clear similarities with Sutcliffe’s MO, two innocent men – Andrew Evans and Anthony Steel – were convicted of these murders.