Captain Scarlet and the Mysterons S01E01 - The Mysterons

The panicked destruction of a mysterious base on Mars unleashes the wrath of an alien race calling themselves 'The Mysterons', who promise their revenge for the attack. Captain Black is taken over to act as the Mysteron's first agent on Earth. Captains Scarlet and Brown are killed and copied by the Mysterons, with orders to kill the World President!