the Cloud of Death

plot
The Neptunians place a large metallic cloud over Earth which blocks the sunlight and are prepared to do the same with every planet in the solar system if the UGO does not send them slaves.  Inspired by a drawing of one of Isaac Newton’s inventions, Haggerty has a large mirror constructed.  Dart and his crew toe the mirror behind them in their Galasphere and position it carefully so that the sunlight is reflected onto the cloud, causing it to melt away.  Raeburn contacts Tyro, the Neptunian overlord, who agrees to consider joining the UGO.

notes
The Neptunians make their second appearance in this episode.  They had previously featured in the Slaves of Neptune.
By the year 2100 the threat of storms has been eliminated, thanks to the advent of cloud dispersal technology.

credits
a National Interest Picture production
produced by Roberta Leigh and Arthur Provis
directed by Frank Goulding
created & written by Roberta Leigh
voices by Libby Morris, Dick Vosburgh, Ronnie Stevens, Murray Cash
puppetry by Martin & Heather Granger, Joan Garrick
electronics by F.C. Judd
space consultant: Colin Ronan
RCA sound recording
script assistant: Denise Kaye
cameraman: Arthur Provis
editor: John Beaton
art director: Roland Whiteside
models: Derek Freeborn
special effects & animation: Bill Palmer, Brian Stevens, Bert Walker