Find out about goblin's gold, why Spain is under attack from spaceballs, and how prehistoric lions could be brought back from the dead.

Find out why a much-loved dolphin has started breaking people's bones, and why a caterpillar wears a hat made out of its own spare heads.

Discover the science behind the puzzle of strange balls of worms on a road, and how an Australian town became plagued by giant bats.

This episode reveals a prehistoric fish that almost destroyed an entire fishing industry. Meanwhile, a foray into freak weather reveals why a monster wave shocked swimmers in Sydney.

Featuring a deep sea blob spotted in the Gulf of Mexico that mystifies oil rig workers and the washed up remains of a gargantuan creature that baffled scientists for decades.

Find out why hundreds of reindeer are mysteriously dying in Norway, why there's a mythical boiling river in Peru and why blood-red rain appeared in Spain.

Find out about the advance of a crab army in Norwegian waters, why spiders are glowing in the dark and meet the chimps with rock dolls in caves under France.