The investigation of Paul Vandervent into the mysterious death of his father brings further discord among two feuding families tied together in business and marriage, living under the same roof.
| Actor | Role |
|---|---|
 Zoë WanamakerCharlotte Collard | Charlotte Collard |
 Christien AnholtPaul Vandervent | Paul Vandervent |
 Patrick MalahideRobert Dangerfield | Robert Dangerfield |
 Christine KavanaghIsabel Collard | Isabel Collard |
 Ian McNeiceGeorge Collard | George Collard |
 Judy ParfittHarriet Collard | Harriet Collard |
 James FaulknerRoger Vandervent | Roger Vandervent |
 Julia St. JohnBeatrice Vandervent | Beatrice Vandervent |
 Nicholas WoodesonBertie Williams | Bertie Williams |
 Ronald FraserDoctor Porter | Doctor Porter |