Joanne Froggatt, the actress who plays Danielle Cable in the drama, actually met with the real-life Danielle Cable in a secret location with two bodyguards protecting Danielle from saying anything which might lead to her being found.
In 1986, Kenneth Noye, the subject of the criminal investigation in this drama, was found guilty of being involved in disposing of gold stolen in the famous Brinks-Mat gold bullion robbery in 1983. Actor Jamie Foreman's father, Freddie Foreman, was a London criminal, who was suspected of, but never proved, to be involved with the planning of that robbery. .