There is no-one quite like Anselm Kiefer. Having achieved fame and notoriety in equal measure in the 1980s, he has become one of the world's most singular and successful artists. Working with themes of history, memory and mythology, Kiefer produces work that is consistently controversial, and monumental in its scale and ambition. In this imagine... Alan Yentob joins the artist at his studios in France and Germany as he prepares for a retrospective at the Royal Academy. In a series of frank interviews set against the backdrop of his awe-inspiring studios, Kiefer discusses the impact of his most significant pieces, installs a selection of new work, and explains why he is as excited and driven by his practice now, at the age of 69, as he was when he began.