This mini-series was dedicated to the memory of Tom Bell (Bill Otley) 1933-2006, who died two weeks before this final television appearance was screened.
The text tone on Tennison's mobile phone is Morse code for S.O.S.
Final ITV acting role of Frank Finlay before his retirement.
Brendan Coyle and Stephen Tompkinson appeared in Ballykissangel (1996).