The USA remade this into a movie with Sandra Bullock. "The Unforgivable "
Suranne Jones (Ruth Slater) & George Costigan (Eddie Ackroyd) also worked together on Scott & Bailey (2011) as DC Rachel Bailey & Joe Bevan respectively.
Suranne Jones (Ruth Slater) & Matthew McNulty (Steve Whelan) also worked together on Five Days (2007) as PC Laurie Franklin & Danny Preston respectively.
Jack Deam (Kieran Whelan) & Matthew McNulty (Steve Whelan) also worked together on episode 3.2, Dark Friends (2006), of Shameless (2004) as Marty Fisher & Trev respectively.
Jemma Redgrave (Rachel Belcombe) & Faye McKeever (Hannah Whelan) also worked together on episode 18.23, Where We Belong (2016), of Holby City (1999) as Bernie Wolfe & Melissa Peters respectively.