The film is adapted from the TV series of the same name. "Secret Agents" was a classic TV series from 1964 to 1968. It aired a total of 105 episodes. It was co-starred by veteran movie stars Robert Vaughan and David Macomb. It was a famous twin-male drama of that year. The story is about two agents from the Joint Law Enforcement Command fighting against the enemy organization T.H.R.U.S.H.（Technological Hierarchy for the Removal of Undesirables and the Subjugation of Humanity）
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