Opened at the Duchess Theatre in London on 23 March 1960. Does the letter given to Carla by the family solicitor hold the answer to her mother Caroline's death in prison, after being incarcerated for the murder of her husband. Was she really guilty? Carla sets about solving the puzzle by turning detective and questions all the people present on that day 16 years ago. Will her mother prove to be innocent?| 25 Nov 13 to 30 Nov 13 | Alexandra Theatre Birmingham, West Midlands Performance Details => Venue archive |
| 18 Nov 13 to 23 Nov 13 | Theatre Royal Glasgow Performance Details => Venue archive |
| 21 Oct 13 to 26 Oct 13 | Royal & Derngate Northampton, Northamptonshire Performance Details => Venue archive |
| 14 Oct 13 to 19 Oct 13 | Opera House Manchester, Greater Manchester Performance Details => Venue archive |
| 8 Oct 13 to 12 Oct 13 | Derby Theatre Derby, Derbyshire Performance Details => Venue archive |
| 30 Sep 13 to 5 Oct 13 | New Victoria Theatre Woking, Surrey Performance Details => Venue archive |
| 9 Sep 13 to 14 Sep 13 | Theatre Royal Brighton, East Sussex Performance Details => Venue archive |
| 2 Sep 13 to 7 Sep 13 | Theatre Royal Norwich, Norfolk Performance Details => Venue archive |
| 27 Aug 13 to 31 Aug 13 | New Wimbledon Theatre Outer London, Greater London Performance Details => Venue archive |
| 27 Aug 13 to 31 Aug 13 | The Playhouse Oxford, Oxfordshire Performance Details => Venue archive |
| 15 Jul 13 to 20 Jul 13 | Theatre Severn Shrewsbury, Shropshire Performance Details => Venue archive |
| 8 Jul 13 to 13 Jul 13 | Milton Keynes Theatre Milton Keynes, Buckinghamshire Performance Details => Venue archive |
| 24 Jun 13 to 29 Jun 13 | Richmond Theatre Outer London, Greater London Performance Details => Venue archive |
| 17 Jun 13 to 22 Jun 13 | Harrogate Theatre Harrogate, North Yorkshire Performance Details => Venue archive |
| 3 Jun 13 to 8 Jun 13 | Churchill Theatre Bromley, Kent Performance Details => Venue archive |
| 28 May 13 to 1 Jun 13 | Regent Theatre Stoke-on-Trent, Staffordshire Performance Details => Venue archive |
| 20 May 13 to 25 May 13 | Palace Theatre Westcliff-on-Sea, Essex Performance Details => Venue archive |
| 13 May 13 to 18 May 13 | Wycombe Swan High Wycombe, Buckinghamshire Performance Details => Venue archive |
| 7 May 13 to 11 May 13 | Theatre Royal Bath, Bath & North East Somerset Performance Details => Venue archive |
| 29 Apr 13 to 4 May 13 | Queen's Theatre Barnstaple, Devon Performance Details => Venue archive |
| 22 Apr 13 to 27 Apr 13 | Devonshire Park Theatre Eastbourne, East Sussex Performance Details => Venue archive |
| 16 Apr 13 to 20 Apr 13 | New Theatre Cardiff, Glamorgan Performance Details => Venue archive |
| 8 Apr 13 to 13 Apr 13 | Wyvern Theatre Swindon, Wiltshire Performance Details => Venue archive |
| 2 Apr 13 to 6 Apr 13 | Blackpool Grand Theatre Blackpool, Lancashire Performance Details => Venue archive |
| 25 Mar 13 to 30 Mar 13 | Curve Leicester, Leicestershire Performance Details => Venue archive |
| 11 Mar 13 to 16 Mar 13 | Yvonne Arnaud Theatre Guildford, Surrey Performance Details => Venue archive |
| 4 Mar 13 to 9 Mar 13 | Arts Theatre Cambridge, Cambridgeshire Performance Details => Venue archive |
| 25 Feb 13 to 2 Mar 13 | Darlington Hippodrome (formerly Civic Theatre) Darlington, County Durham Performance Details => Venue archive |
| 18 Feb 13 to 23 Feb 13 | Pomegranate Theatre Chesterfield, Derbyshire Performance Details => Venue archive |
| 11 Feb 13 to 16 Feb 13 | King's Theatre Edinburgh Performance Details => Venue archive |
| 4 Feb 13 to 9 Feb 13 | Grand Theatre Wolverhampton, West Midlands Performance Details => Venue archive |
| 28 Jan 13 to 2 Feb 13 | Malvern Theatres Malvern, Worcestershire Performance Details => Venue archive |
| 21 Jan 13 to 26 Jan 13 | Everyman Theatre Cheltenham, Gloucestershire Performance Details => Venue archive |
| 8 Jan 13 to 19 Jan 13 | Theatre Royal Windsor Windsor, Berkshire Performance Details => Venue archive |
