In the series time line, this episode takes place roughly two (2) years later than the last series. Several things have changed, for instance Bacchus is now separated from his wife and has traded his little MG for a more practicable sedan. PC Taylor now boasts an impressive mustache. There is also a larger role for the coroner who now provides much more detailed forensics information than in past series, a sign of progressive scientific change.
This series is the first to be completely shot in England, whereas the first two series were primarily filmed in Ireland.