We explore the world of US artist Mike Kelley with the first UK exhibition of his work at the Tate Modern. ‘Ghost and Spirit’ shows Kelley’s influential and experimental practice ranging from drawings and collages to multimedia installations of “dark pop art”. Robert Bound speaks to Catherine Wood, the Tate Modern’s director of programme, about the show. Plus: Lisson Gallery content director Ossian Ward shares his view of Kelley’s imaginative career.