the grounds were sold to the Welsh National Memorial Trust for £11,000 in March 1921, an organisation founded to combat tuberculosis in Wales. Reconstructed as a sanatorium and called the Adelina Patti Hospital at the request of her widower, it admitted its first patients in August 1922. In 1947, the children of Craig-y-nos were among the first in the UK to receive the first effective TB medicine, the antibiotic streptomycin. In 1959, it became a hospital for the elderly. After the transfer of remaining patients to the new Ystradgynlais Community Hospital, the castle closed as a hospital on 31 March 1986. More information about Craig-y-nos' time as a TB hospital may be found in the book 'The Children of Craig-y-nos' by Ann Shaw and Carole Reeves. Clive Rowlands, a famous rugby player, was one of its patients, being admitted in 1947, as an eight-year-old. He was given a rugby ball as a gift and accidentally kicked it through a glass door, for which he was put in a straitjacket for a week. In a project supported by the Heritage Lottery Fund, the Sleeping Giant Foundation charity, the Wellcome Trust Centre and University College of London, in 2007 an exhibition at the Welfare Hall, Ystradgynlais, showed relics and recorded recollections of patients from its time as a TB sanatorium. Recent history The Welsh Office declared Craig-y-nos Castle and its unique theatre surplus to requirements soon after the opening of the new Community Hospital in nearby Ystradgynlais. In 1988 the freehold of the property was sold to a consortium of businessmen who formed the Craig-y-nos Castle Company Ltd. After a long period of repair and restoration, the castle opened to the public as a functions venue but was badly hit by the economic recession of the early 1990s. Craig-y-nos Castle was then sold to John and Penelope Jones who continued the essential repair work including the complete renewal of the theatre's courtyard doors, installation of new central-heating system, re-roofing the theatre, while organising national antiques fairs, musical events and wedding receptions. In October 2000 they sold Craig-y-nos to SelClene Ltd. which continued the restoration, and opened the castle as a hotel. The castle gardens are listed Grade II* on the Cadw/ICOMOS Register of Parks and Gardens of Special Historic Interest in Wales. In 2005, the castle featured in the BBC Doctor Who episode Tooth and Claw, featuring David Tennant as the Doctor