The Week’s guide to what’s worth seeing and reading

Last chance

Winifred Knights (1899-1947) at the Dulwich Picture Gallery, London SE21 (020-8693 5254). A “compelling” show celebrating this neglected British artist (Guardian). Ends 18 September.

Showing now

The Dresser at Richmond Theatre, Surrey (0844-871 7651). Ken Stott and Reece Shearsmith star in Ronald Harwood’s play about an ageing actor and his devoted dresser. Until 17 September; then Brighton Theatre Royal and Cheltenham Everyman. From 5 October: Duke of York’s Theatre, London WC2. See www.thedressertheplay.com.

Book now

Cardiff is hosting a weekend-long centenary celebration of one of its best-loved sons. For Roald Dahl’s City of the Unexpected, more than 6,000 people will take part in performances and events across the city, including a mass pyjama picnic in Bute Park. 17 and 18 September (www.cityoftheunexpected.wales).

William Kentridge’s take on Alban Berg’s modernist opera Lulu was a hit at the Met last year. Now it’s coming to the ENO, starring soprano Brenda Rae. “A searing production” (New York Times). 9-19 November, Coliseum, London WC2 (020-7845 9300).

Just out in paperback

Submission by Michel Houellebecq (Vintage £8.99). In this “mischievous” satire, the year is 2022, and a new, fundamentalist Islamic party sweeps to power in France (Guardian).