First broadcast 14th December 1980.
Roland Trent is in love with Anna, who is gradually losing her sight but could have an operation to save it.
Anthony Valentine ... Roland Trent
Hilary Tindall ... Vivienne Trent
Amanda Redman ... Anna Warrack
Patricia Mort ... Olive Parsons
Roger Brierley ... Jack Parsons
Pauline Letts ... Joan Wilcox
Alan Foss ... Hector Wilcox
Murray Ewan ... Professor Coburn
Robin Marchal ... Clinker
Bryan Andrews ... Police Inspector
