Caryl Churchill's Blue Heart consists of two related short plays, Heart's Desire and Blue Kettle, both examining strained family – and especially filial – relationships. It was first performed at Theatre Royal, Bury St Edmunds, on 14 August 1997 in a touring co-production by Out of Joint and the Royal Court Theatre.
In Heart’s Desire, Brian and his wife Alice, together with Brian's sister Maisie, are waiting for the arrival of their daughter Susy, who is returning home after some years spent in Australia. A simple domestic scenario is replayed over and over with widely differing developments – some heartbreaking, some wildly comical or surreal.
In Blue Kettle, a middle-aged man, Derek, and his girlfriend, Enid, are involved in a con trick, making a series of elderly women believe that Derek is the son they once gave up for adoption. But as the situation develops, the play's dialogue undergoes a radical distortion with characters using the words 'blue' and 'kettle', apparently at random, and to an extent that grows increasingly disruptive.
The Out of Joint/Royal Court touring production was directed by Max Stafford-Clark and designed by Julian McGowan, with a cast including Gabrielle Blunt, Jacqueline Defferary, Karina Fernandez, Barnard Gallagher, Valerie Lilley, Mary Macleod, Eve Pearce, Jason Watkins and Anna Wing. Following the performances at Theatre Royal, Bury St Edmunds, it opened at the Traverse Theatre, Edinburgh, on 19 August 1997, and at the Royal Court Theatre Downstairs (at the Duke of York's) on 17 September.