The Sunday Preview: The five best plays

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Someone Who'll Watch over Me (Hampstead, 071-722 9301). Heartbreaking hostage comedy with fine performances by Hugh Quarshie,

Stephen Rea and Alec McCowen.

Grand Hotel (Dominion, 071-580 9562). Superbly crafted show with twice the content of the average musical and the best dancing in town.

Pygmalion (Olivier, 071-928 2252). Spectacular conflation of Shaw's theatre and film texts, with Alan Howard and Frances Barber.

Six Degrees of Separation (Comedy, 071-867 1045). Well-earned transfer for the accomplished moral comedy by John Guare, with riveting performances by Stockard Channing and Adrian Lester. Irving Wardle

Shades (Albery, 071-867 1115). Pauline Collins arrives in the Judi Dench league with an unnerving portrait of a Glaswegian mum in Sharman Macdonald's strong new play. Robert Butler