American V.I.P James Burn II finds his son James Burn III (Bob Sherman) leading a giant "sleep-in" that has taken over Windsor Castle. He hires Nancy (Lulu) to get him out of the castle and into work. With the help of her crazy eccentric father, (Wilfred Hyde-White) who believes in working day and night and producing nothing and uses a fantastic astro-telescope for casual bird watching, she does just that !
| Actor | Role |
|---|---|
 LuluNancy | Nancy |
 Bob ShermanJames Burn III | James Burn III |
 Wilfrid Hyde-WhiteDobson | Dobson |
 Spike MilliganMr. Lal | Mr. Lal |
 Patrick CargillDr. Harrison | Dr. Harrison |
| FFiona CurzonMaureen | Maureen |
 Jack HulbertSir Hugh Fawcett | Sir Hugh Fawcett |
 Terry-ThomasAppleby | Appleby |
 Bruce BoaDr. Softman | Dr. Softman |
 Robert HuttonJames Burn II | James Burn II |
 Henry McGeePilkington | Pilkington |
| EEunice BlackNot listed | Not listed |
 Priscilla MorganMrs. Trulove | Mrs. Trulove |
| AArthur BlakeDan Haydock | Dan Haydock |
| BBarry WilsherVicar | Vicar |
 Marianne StoneMrs. Lal | Mrs. Lal |