"Manhunt" is the fourth episode of the Supermarionation television series Captain Scarlet and the Mysterons. It was the fifth episode to be produced. Its original UK air date was October 20, 1967 on ATV Midlands. It was written by Tony Barwick and directed by Alan Perry.
In the search area around the atomic centre, Black murders a filling station mechanic to access a concealed SPV. When Captains Scarlet and Blue arrive to requisition the vehicle, they encounter the Mysteron reconstruction of the mechanic, who tries to kill them but is disposed of by Scarlet.
The Spectrum trucks detect Black's trace as he speeds down a highway in the SPV. Captain Ochre mounts a roadblock to stop him, but Black is warned of the obstruction by the Mysteron voice and ordered to return to the Culver Atomic Centre, where he will be undetectable to Spectrum from within the surrounding radiation. Symphony Angel, who sighted the SPV from the air, lands her interceptor nearby. She is abducted by Black, who crashes the atomic centre's gates to gain entry to the complex.
By night, the Spectrum forces have converged on the atomic centre. Inside, Black forces Symphony into an isolation chamber and subjects his hostage to lethal radiation, but eventually decides to spare her life. Instead, he forces Symphony to drive out of the atomic centre in the SPV – while Scarlet and the other officers pursue the vehicle, believing that Black is the driver, the entrance to the complex is unguarded, allowing Black to go through a cleansing facility to rid himself of his radiation before making his escape. Symphony soon crashes the SPV and Spectrum finds that it has been fooled.