Family picnics should not be like this; bugging devices, men with X-ray eyes. Mary doesn't understand what terrifies Simon, nor the bizarre events of the next six months.
| Actor | Role |
|---|---|
 Stephen MooreSimon Hulse | Simon Hulse |
 Morag HoodMary Hulse | Mary Hulse |
 William Morgan SheppardHarry Cowper | Harry Cowper |
| MMatthew StradlingMatthew Hulse | Matthew Hulse |
| VVictoria GoodwinLucy Hulse | Lucy Hulse |
| HHarriet ReynoldsCath Cowper | Cath Cowper |
 John Franklyn-RobbinsShales | Shales |
 Ewan HooperDoctor | Doctor |
| HHugh ThomasTennant | Tennant |
 Margaret FordMiss Postlethwaite | Miss Postlethwaite |
 Peter GuinnessPolice constable | Police constable |
| RRalph LawtonPolice sergeant | Police sergeant |
| HHugh DicksonSolicitor | Solicitor |
 Alison ElliotGirl in flat | Girl in flat |
| AAlastair YatesNewscaster | Newscaster |