
The series, in which Dennis Waterman and Amanda Redman star as part of a team of crack detectives, earned a 16.6% share for BBC One.
ITV romantic comedy drama 'Married Single Other' attracted 3.9 million viewers and a 15.8% share.
Channel 4 aired the latest instalment in reality series 'The Secret Millionaire' in the same 9pm-10pm slot, drawing 2.5 million viewers (including the contribution from Channel 4 +1).
BBC Two show 'A Band For Britain', in which presenter Sue Perkins overhauls a brass band, pulled in 1.6 million viewers, while Five aired the classic Western 'The Good The Bad and The Ugly', which was watched by an audience of 1.2 million.