Henry Wilkes cultivates rare tropical plants as a hobby, with an attention to detail closer to obsession. The length to which he goes to propagate and nurture new hybrids alarms his wife. Is there more going on in the greenhouse than could safely be exhibited at the next Battersea Flower Show?
| Actor | Role |
|---|---|
 Milo O'SheaHenry Wilkes | Henry Wilkes |
 Christine HargreavesMonica Wilkes | Monica Wilkes |
| PPatsy RowlandsAnne Lovejoy | Anne Lovejoy |
| DDesmond JordanDr. Chambers | Dr. Chambers |
| EEric ThompsonNorman | Norman |
 Bernard KayDet. Sgt. Crouch | Det. Sgt. Crouch |
| AAlan HaywoodDet. Con. Fraser | Det. Con. Fraser |
 Ann LancasterMrs. Bryant | Mrs. Bryant |
| JJulie MayMrs. Dixon | Mrs. Dixon |
| NNigel LambertMilkman | Milkman |
 Jack WildDanny | Danny |