"Attack on Cloudbase" is the 31st episode of the 1960s Supermarionation television series Captain Scarlet and the Mysterons. The penultimate episode of the series, it first aired in the United Kingdom on ATV Midlands on 7 May 1968. In this episode, Symphony Angel ejects from her damaged interceptor into the Sahara Desert; before she is located, Mysteron spacecraft enter Earth's atmosphere and launch a devastating assault on Cloudbase.