Using sculptural installation, photography and drawing, Ivan Smith stages grim, wry and witty scenarios for his trademark protagonists of GI Joes or Action Men, such as Burial (pictured). At Derby Museum and Art Gallery, to 10 July
Photograph: Mukti
Over the past 20 years Callum Innes's quietly absorbing geometric blocks of definite colour – offsetting sections marked by watery rivulets and fading pigment – have made him a key figure exploring the process of painting. At Frith Street Gallery, W1, 13 May to 1 July Photograph: PR
This group exhibition includes the Portuguese conceptualist Helena Almeida, whose combinations of black-and-white self-portraits interrupted by painted splashes of blue, have the 'now you see it, now you don't' of a magic trick. Above, Inhabited Painting 1976. At Arnolfini, 12 May to 3 July Photograph: PR
The big art commission, at the Old Municipal Market, is from Kutluğ Ataman, the Turkish artist famed for his wry takes on how people navigate cultural codes. Above, Ataman's Journey to the Moon. Various venues, 7 May to 29 May Photograph: PR
Withers's blunt stripes seem to levitate like painterly UFOs; the picturesque scenes drained of all topographical detail and infiltrated by alien geometries. The effect is somehow soothing yet inescapably unsettling. Above, Contrivance, 2010. At Tarpey Gallery, to 28 May Photograph: PR
North-east newcomer Sophie Lisa Beresford is a live wire, making her mark with video, sculpture and photo works and through pure strength of carefree spirit. Above, Cosmic Ribbon, 2007. At Workplace Gallery, to 11 June Photograph: PR
Machismo runs riot in this young Tehran-born artist's vision of a woman-free world. Depicted in aggressive comic-book style, Madani's cartoon violence with appalling real world implications makes for the blackest comedy. Above, Chinballs with Flag, 2011. At Pilar Corrias, W1, 11 May to 18 June
Photograph: Courtesy of the artist and Pilar Corrias Gallery
The plight of China's most famous artist – still missing at the time of writing – adds a horrible urgency to Weiwei's major new exhibition – Circle of Animals/Zodiac Heads – opening in London. In Somerset House's courtyard, 12 bronze heads of animals from the Chinese zodiac recreate sculptures looted in the 19th century – above, Zodiac Heads, Rooster, 2010. The Lisson presents key works exploring the contradictions of consumer culture and rapid social change. At Somerset House, WC2, 12 May to 26 June; Lisson Gallery, NW1, 13 May to 16 July Photograph: PR
