Chris takes a closer look at some holes in the Russian tundra, locates an underwater lake, and chats to the maker of a canon built for salmon.

Chris discovers the secrets behind a flame-filled firenado, unearths a very odd looking living rock, and meets a team of oversized rats who save lives by sniffing out landmines.

Chris explores the mysteries behind a glacier that bleeds red, finds out how an electrician got tattooed by a lightning bolt, and uncovers the remarkable story of a man with a tooth for an eye.

Chris reveals how deadly poisonous frogs can saves lives, why we see faces in everything, and how one woman's pants spontaneously burst into flame.

Chris unearths a whirlwind wedding ceremony, some exploding rocks, and a woman with her twin inside her brain.

Chris Packham uncovers the world's weirdest events, from a man who gets drunk without touching a drop of alcohol, to some chart-topping molecular music.

Chris Packham uncovers the secret of a suspiciously fishy oil slick, what's making a lemming very angry, and how a man can see with his ears.

Chris Packham unlocks the secrets behind the world's weirdest events from a bird-killing solar death ray to a monkey that's learnt first aid.