Helen Mirren narrates a documentary examination of penguins doing CrossFit, featuring Janice Rams fighting over a hummus recipe, a nearsighted eagle who reports on the traffic and more Unpopular Wolf Opinions.

Helen Mirren narrates a documentary examination of the animal kingdom, featuring hippos that solve crimes ripped from the headlines, a cheetah haunted by everyone it ever ate, a snake celebrating its 30th birthday alone and the creepiest looking cat you ever saw, on the season finale of "When Nature Calls with Helen Mirren,"