Nigel Patrick (Capt. Clive Norton)Kathleen Harrison (Nannie Cartwright)David Tomlinson (Humphrey 'Humpy' Miller)Jill Day (Mary)David Hurst (M. Victor)Leo McKern (Gaston Nikopopoulos)Nicholas Phipps (Gen. McLintock-White)Joan Young (Mrs. Hackenfleuger)Lionel Jeffries (Maitre D', Hotel)Paul Hardtmuth (Porter)Fabia Drake (Opulent Lady)Tommy Farr (Bruiser)Charles Lloyd Pack (Doctor)Robin Browne (American Boy)Dorothy Gordon (W.R.A.C. Orderly)Neil Hallett (Alphonse)Julia Arnall (Young Woman on Aeroplane)Paul Beradi (Airline Passenger)
In a Swiss Alpine resort shortly after the War an army officer and upper-class Humpy Miller both set their sights on Mary, the landlord's daughter. After the two come down with chicken pox, they are put in the charge of fellow guest Miss Cartwright, who turns out to be Humpy's old nanny. The two Englishmen unite not only against her tyranny but against a dense Greek who is also after Mary.