AllMovie

As chapter six of Secret Agent X-9 reveals, the booby-trapped bookcase missed Agent X-9 (Scott Kolk), but Pidge (David Oliver) is slightly wounded in the shoulder. Blackstone (Henry Brandon), meanwhile, shadows Ransom (Leonard Lord), a defecting gang member, to the Farmers & Mechanics Bank in Adamsville, where the latter picks up what he assumes to be the Belgravian crown jewels. But the government has performed a switch, and the jewelry case proves to be filled with lead. X-9 goes to arrest Blackstone, but in the inevitable fight, someone -- X-9 himself? -- is seen falling to his death from an open window.