Hayley Mills is pretty skilful in this spirited effort from David Swift. She plays posh sister "Sharon" and not so posh sibling "Susan" who meet at one of those summer camps that parents offload their unwanted children to during the long holidays. Needless to say, they cannot stand one another and after causing havoc for just about everyone else, are forced into isolation. It is during this confinement that things start to thaw between them and they realise they are twins - separated at birth when their parents divorced. They concoct a cunning wheeze - the wrong sister will go home to the wrong parent. "Sharon" to her father "Mitch" (Brian Keith) whilst "Susan" will go to her prim and proper mother "Maggie" (Maureen O'Hara). Their plan is to manipulate their parents into falling in love again and happy families will ensue. "Sharon" faces the bigger challenge when she discovers that his dad's friend "Vicky" (Joanna Barnes) has designs on her father, so the girls have to fetch their mother from Boston to California if their cunning plan is to succeed! The premiss is far-fetched, but Mills juggles her two roles well; the dialogue at the start is entertaining and the mischief the girls get up to does raise a smile. Sadly, though, the adults drag it all down - especially a really out of sorts O'Hara, who just didn't seem at all comfortable in her role. Keith, to be fair, was never the most versatile of actors - and here he pulls it off ok, but as the grown up melodrama starts to subsume the plot, I found myself just a bit weary as it really did start to plod towards the two hour mark.
