Starring John Gregson, Mai Zetterling, John Ireland,
Michael Denison and Tony Wright
Directed by David Eady
Runtime: 84 min.
Print Quality: B
Businessman and inventor Richard Hammond is determined to develop and market the perfect light-bulb. In a freak lab accident he is blinded and suffers a partial breakdown. His wife, partner and brother take him to his country house, but then Hammond starts to suspect all is not what it seems.