Jacob Ifan as 'PC Jake Vickers'

Rookie cop Jake joined the force to follow in his father’s footsteps.

But working in the same division as his Chief Super Dad, Jake soon realises that being the boss’ son isn’t a bed of roses – in fact it’s full of thorns – as his new Tutor Constable Ryan is quick to point out his every fault.

Self-assured, if a little naïve, Jake is determined to earn his place on the team but fails to realise that a romance with provocative defence solicitor Simon, could undo all of his hard work

Ashley Walter as 'PC Ryan Draper'

Ryan is a committed and principled cop with an impeccable record.

he’s been charged with mentoring the new rookie cop, Jake, who just happens to be the Chief Super’s son. But uncompromising Ryan doesn’t care who Jake’s Dad is, he has high expectations and expects Jake to meet them.

A devoted single dad to his two children, Ryan has equally high standards at home but his controlling and over-bearing nature threatens to drive away those he loves most.

Martin Compston as 'Steve Arnott'

Now considered one of AC-12’s leading investigators, Steve is hoping to get promoted.Steve’s back in his waistcoat being his arrogant little self again. He’s really pushing for a promotion and things are just a wee bit frosty between him and Kate. They always have that love/hate relationship, when they really need each other they are there for each other but they really can annoy each other at times.

Idris Elba as 'Luther'

As the show is linked with the one of BBC's 'Luther'.Luther will be appearing in the series as a side character/cameo and will act as a side story on the show.

In which Luther is a brilliant but emotionally impulsive detective who is tormented by the dark side of humanity while hunting down murderers. Once the self-destructive detective knows the killer's identity, it becomes a psychological duel between predator and prey.