Could organless plasmodial slime mould hold secrets about intelligent life?

Neither plant nor animal, shapeshifting plasmodial slime mould was once considered a fungus, which it sometimes resembles. The mould crawls 1/25th of an inch per hour in search of life-sustaining nutrients and, despite lacking a brain, displays basic forms of computation and intelligence. This trailer for the feature-length documentary The Creeping Garden gives a brief glimpse into what has made plasmodial moulds such a point of fascination for scientists, mycologists and artists, including whether the moulds could hold clues to the origins of intelligent life.