David Attenborough's entertaining romp through the world of monkeys has a serious side: for when we look at monkeys, we can see ourselves. From memory to morality, from 'crying wolf' to politics, monkeys are our basic blueprint. Pygmy marmosets 'farm' tree sap; bearded capuchins in Brazil develop a production line for extracting palm nuts; white-faced capuchins in Costa Rica tenderly nurse the victims of battle; and in the Ethiopian highlands, a deposed gelada baboon has got the blues. Cheating, lying and bare-faced murder are all there too. These revelations of simian science, combined with captivating photography, make this film about monkey business our business.