Spooks (2002)

S9E2 Oil Baron

Beth feels the weight of her mission as she goes undercover for MI5 for the first time. Her assignment is to safeguard powerful oil mogul Robert Westhouse after the team learns of an impending assassination plot during a high-stakes meeting of oil executives. Just when she thinks she has everything under control, an unforeseen ambush disrupts the operation and risks exposing her shadowy past as a mercenary. At the same time, Lucas pays a visit to someone who is shocked to find him back in their life.