The team is reeling after their shocking discoveries, but there's a new name to investigate, and it's down to Wendy to go in undercover to suss him out. The team hope she's ready for the challenge, but when Philip turns out to be a tricky target, will she hold her nerve? When Philip is found to have connections to both the IRA and KGB, the pressure is suddenly on. Wendy needs to buy the team time to get to the bottom of this terrifying relationship.

Joe has trouble of his own, as their mission's security is under threat from a mole inside MI5. And as leaked information threatens the ongoing investigation, lives are being put at risk. Can Joe discover the mole's identity before it's too late? Show less