These special effects storyboards were drawn for the episode "Devil's Planet", the 22nd episode of Series 2 of "Space: 1999". At the start of the series they were drawn by Brian Johnson and Cyril Forster, but as Brian became busier Cyril took over most of the work. These are original hand-drawn images in different color markers and are exceedingly rare, and I know of only five others surviving examples (for "The Immunity Syndrome", see below). This one came directly from Brian Johnson.
Lots more info here: Nuno Miranda's Original Film & TV Props Collection: Space: 1999 (1975) Original colour storyboards for "Devil's Planet"