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8 Episodes 0 - 2017
Episode 1
The fifth series opens with finding out why Spain is under attack from spaceballs, reveals a slimy invasion in Florida, the origin of a mysterious underwater blob and learns about prehistoric lions that could be brought back from the dead.
Episode 2
Chris examines the bizarre case of a mystery stinger in Australia, finds out what poisoned a scientist on a jungle expedition, why goats are flying in Utah and why albatross are being planted in flowerpots off the coast of New Zealand.
Episode 3
Chris Packham tries to understand why a much-loved dolphin has started breaking people's bones, why a caterpillar wears a hat made out of its own spare heads and how a tiny crustacean has mastered the art of invisibility.
Episode 4
Chris Packham solves the mystery of strange balls of worms on a road and fish stuck in fences in Texas and explains how an Australian town was plagued by giant bats and why so many sperm whales became stranded around the North Sea in 2015.
Episode 5
Chris Packham uncovers nature's super survivors - a frog whose dinner is fighting back, a shark with the secret to long life and a prehistoric fish with a thirst for blood that almost destroyed an entire fishing industry.
Episode 6
Chris Packham unravels some of nature's oddest events. Featuring a deep sea blob spotted in the Gulf of Mexico that mystified oil rig workers and sent the internet in to frenzy, the washed-up remains of a gargantuan creature that baffled scientists for decades and a stowaway spider with a set of unfathomable feet.
Episode 7
Chris Packham investigates the strangest stories from the natural world. He uncovers the mysterious sudden death of hundreds of reindeer in Norway, discovers a mythical boiling river in Peru and finds out why blood red rain appeared in Spain.
Episode 8
Chris Packham uncovers some bizarre events form the natural world. He examines a mysterious die-off of saiga in Kazakhstan, investigates strange holes ripped out of the clouds and uncovers the real reason for a long line of pits carved out of the Peruvian desert. Chris charts the advance of a crab army in Norwegian waters, finds out what is killing off seabirds on remote islands and what makes spiders glow in the dark, discovers chimps with rock dolls and explores strange mineral deposits alive in the caves under France.