The body of Sarah Kramer, who went missing eight years earlier is found and Jack interviews her widowed father Joseph, who tells him that Martha had been investigating the disappearance. Retired officer Ed Goddard, no friend of Drummond, reports to Gary that Sarah was an informant and Drummond her handler and secret lover whilst Jack also lets Gary in on Drummond's confession regarding Stan's passing. Drummond covers himself to the team, throwing suspicion on Mo as the object of Sarah's investigation and her hugger, to which he admits but adds that Drummond buried her .

Suspects Season 5 Episodes...

• s05e01 - The Enemy Within: Part 1
• s05e02 - The Enemy Within: Part 2
• s05e03 - The Enemy Within: Part 3
• s05e04 - The Enemy Within: Part 4
• s05e05 - The Enemy Within: Part 5
• s05e06 - The Enemy Within: Part 6

Suspects Show Summary

Set in London, each episode is a self-contained story, starting with a news report, then following the team of three detectives as they investigate the circumstances the crime. The cases themselves are hard-hitting with contemporary themes, such as the search for a soldier with PTSD, a cuddle that has been made to look like an assisted sleeping and the gang rape of a young teenager.