The Avengers (1961)

S03E22 The Outside-In Man

Arabian revolutionary Sharp arrives in Britain, and Steed is tasked with overseeing his security. Steed finds it ironic that they are now safeguarding a man they once aimed to eliminate five years ago. During the chaotic turmoil in Abarain, two agents were presumed dead, but it turns out one of them has survived and is very much alive.