A beautiful, gentle, constantly entertaining science-fiction film, ahead of its time. Bruce Dern gives perhaps his best screen performance as a 21st-century botanist who refuses an order to terminate his floating greenhouse and goes to any lengths, including the murder of his colleagues, to ensure its continuance. Not even two delightful robots called Huey and Dewey can steal Dern's show here. One of a kind, with lovely, crystal-clear colour photography by Charles F Wheeler.