Crispin Wingfield

Crispin Wingfield was an MI6 agent who was betrayed by his MI6 handler and was tortured by Alexander Zukanov in Bulgaria. He somehow made it back to England and tracked down Alexander, he was suspected of killing Alexander. He was interrogated by DI Joseph 'Joe' Chandler and revealed that he was left in Bulgaria to die, later he was killed by an unknown assailant who threw him out of a window or Crispin committed suicide.