Official website: https://www.itv.com/watch/six-four/10a2162
Casts
Kevin McKidd
DC Chris O'Neill
Vinette Robinson
Michelle O'Neill
Richard Coyle
Robert Wallace
James Cosmo
Jim Mackie
Iona Anderson
Annabel Wallace
Andrew Whipp
Philip O'Neill
Brian McCardie
Bill Martin
Saskia Ashdown
Bryony Davis
