Ashes to Ashes (2008) - 2x06 - Episode 6

A dead body found floating in a canal is identified as Colin Mitchell, a man recently reported missing by his glamorous wife, Donna. Gene discovers that Colin worked for Trevor Riley, a nasty loan shark with a habit of hurting those who mess with him. A ruthless capitalist, Riley invokes terror in the community he controls, and Gene sets his sights on bringing this cocky and unscrupulous man down.

Alex can't shake the feeling that Donna is hiding something, and wants to use her profiling skills to explore the case further. However, these skills start to fail her as she undergoes surgery in 2008 to have the bullet removed from her brain. Alex can only wait to see if she'll pull through. Meanwhile, Gene's determination leads him onto equally dangerous ground.