'What Have They Done to the Rain?' by Ian Stuart Black

On Medusa, Rudi discovers that the planet’s surface is turning into slime because the rainfall is somehow disintegrating the planet’s crust. However, when he attempts to warn Octavia that all life on Medusa will soon be destroyed, the matriarch arrogantly refuses to listen, insisting that her Prediction Computers indicate that all is well…

Judy Geeson (Supreme Councillor Fulvia), Christiane Kruger (Security Chief Octavia), Lisa Harrow (Liz Becker), Christian Quadflieg (Rudi Schmidt), Dawn Addams (President Clara), Anna Carteret (Announcer), Kirstie Pooley (Guard), Annette Lynton (Clara's Assistant), Ann Maj-Britt (Octavia's Assistant)

Directed by
Produced by Freddie Francis

TX:
UK: 3rd November, 1976

Notes:
*Featuring President Clara, Supreme Councillor Fulvia, Security Chief Octavia, Liz Becker, Rudi Schmidt