Waking the Dead: Season 4 (2004)

In Sight of the Lord. Tony McHale. Murders by nine inch nail through the head, going as far back as 1948. There's a military connection. The thugs involved beat one of their own platoon so badly he's in hospital for six months - and doesn't shop them / there's no enquiry? I think there would have been. Still, quite a haunting story, with Michael Byrne, a steady worker since 1963, Geoffrey Bayldon, Clive Wood, JJ Feild.

False Flag. Stephen Davis. An old IRA killing is uncovered - it's Timothy West's son (and Dearbhla Molloy). But a 'false flag' is where a country makes out another country is the culprit, and in fact it's the UK turning on its own. Also Boyd and the unit are being investigated by Caroline Lee-Johnson.

With Danny Webb, Tom Georgeson.

I believe it's Petersham Place SW7.

Above, Boyd not talking any shit from authority, something he shares with other beloved TV detectives like Morse.