Hugo is a brilliant turn-of-the-century scientist, loved and respected by his family and friends, admired by his colleagues. But he is a man quickly becoming obsessed with a curious and frightening question... what is the mysterious apparition found in the photographs of his dying subjects?
Robert Powell
as Giles Cunningham
Robert Stephens
as Sir Hugo Cunningham
Jane Lapotaire
as Christina Cunningham
Alex Scott
as Sir Edward Barett
Ralph Arliss
as Clive Cunningham
Fiona Walker
as Anna Wheatley
Terry Scully
as Pauper
Tony Caunter
as Warden
Paul Bacon
as 1st Member
