Richard E. Grant explores the evolutionary roots of wrath; like humans, animals also experience a rush of blood to the head, fueled by a cocktail of hormones.

Richard E. Grant explores the evolutionary roots of lust - the intense, out-of-control craving for sex; like humans, animals feel lust too, otherwise species would die out.

Richard E. Grant explores the evolutionary roots of sloth - pure laziness; an examination of what role it plays in nature, which is usually built on fierce competitiveness.

Richard E. Grant explores the evolutionary roots of gluttony; an examination of eating too much, too quickly, or too wildly and whether it also exists in the natural world.

Richard E. Grant explores the evolutionary roots of envy - an obsession with the possessions of others; examining if it also exists in the animal kingdom.

Richard E Grant explores the evolutionary roots of pride; he looks at displays of this seemingly human trait in stag beetles gorillas and hyenas.