Charlie Green

Recruited to MI5 for his mathematical skills, Charlie is good at puzzle solving, code breaking and probability; not so good with people.

The bomb completely changed Charlie’s life. He went from being a young man whose aspirations were to receive a Nobel Prize in mathematics, to becoming an MI5 agent in one swift move.

Living through such a life changing experience really changed Charlie’s viewpoint on life explains Liam: "MI5 recruitment gave Charlie an opportunity to help people and he jumped at it."

But his new-found view of life doesn't impress his colleagues: "No one really has any respect for Charlie when he starts," explains Liam. "But throughout the series he shows great leadership skills and the other officers often look at him with disbelief over what he's just come up with."

However, Charlie’s leader, Hannah, shows great faith in him by entrusting him with some top secret information on her personal investigation into the London bomb and a potential MI5 mole: "Hannah sees how focussed Charlie is and how he handles situations differently to the other team members; he sees things from every possible angle, and fast, which is why she has faith he'll find the MI5 traitor."

Liam isn't so sure he'd be the best man to jump into a pair of MI5 shoes though: "I'd be a ridiculous spy. But then looking at it from a practical point of view if I was living in the Britain of Spooks: Code 9 I don't think I'd be acting either as there'd be no one in London and no work, so I may as well join MI5!"

Playing Charlie in Spooks: Code 9 is Liam's first television lead role. However, he has already appeared in a string of hit dramas, including The Street, Instinct and Drop Dead Gorgeous.