Aliens could be lethal killers who want to invade and plunder our world. A team of experts investigate extra-terrestrial beings and their threat to human life.

Until recently, black holes were only theoretical. Now, scientists know that millions exist and some of them have the potential to be lethal to earth.

Confidential CIA files reveal a secret war for space between America and the Soviets. And, experts investigate American espionage during the Apollo programme.

Experts investigate the Lunar Landing Research Vehicle that nearly killed Neil Armstrong during training. Some believe this proves why the moon landing is fake.

Rob Nelson investigates the mysterious rocks at the bottom of Lake Michigan known as Underwater Stonehenge. Plus, the search for escape tunnels in Alcatraz.

Rob Nelson investigates mysterious tunnels under Denver's airport. Plus, in Ohio he tries to uncover the secrets of a giant serpent-shaped mound.

How do they make the world's most expensive and luxurious beds? And, how do they deliver supplies and equipment to the International Space Station?

How do they make the distinctive Borsalino hat worn by Indiana Jones? And, how do they make a bicycle which can fold up to a tenth the size of a regular bike?

How do they make the world's most famous electric guitar, the Fender Stratocaster? And, how do they make Swedish fermented cod roe Kalles caviar?

It's been tipping over for 800 years - what's the gravity-defying magic behind Pisa's leaning tower? And, how are chocolate digestive biscuits manufactured?

How did the ancient Greeks invent parchment with techniques still used today? And how do they make shuttlecocks, the fasting moving object in sport?

After an informant tells of an alien that reportedly escaped from Area 51, Chuck and the team go to Tonopah, NV, to investigate whether it still roams the area.

Phil Torres and Dr. Tori Herridge go on a journey to Siberia for the biggest ever Ice Age dig, unearthing a treasure trove of animals buried in the ground for thousands of years.

Clay returns to his ranch in Montana to hunt for quick finds at Old Faithful. In Wyoming, Mike and his team continue excavating their triceratops site.

In Montana, Clayton prepares to learn if his carnivore skeleton belongs to a T-Rex or Nanotyrannus. In Wyoming, Mike and Aaron dig at a promising new site.

How do they blow the world's finest crystal, heat the deepest swimming pool, and fill a million bottles a day of the world's favourite ketchup?

How do they turn Sheffield steel into a carpenter's handsaw, make a microphone that can pick up a whisper, and safely steer through a frozen river?

How do they mine one of the rarest gemstones in the world, craft the classic cowboy boot, and build a road sweeper that can pick up seven tonnes of trash?

How do they make the world's softest duvets, drill for oil thousands of metres below ground, and put the stretch in rubber bands?

How do they build a diesel engine that can fly, make cough sweets, turn clear plastic into bank notes, and whip up ice cream flavours?

How do they turn used aluminium cans into planes and rockets? Plus, how do they carve the traditional Black Forest cuckoo clock?

The NASA tapes that recorded the Apollo 11 moon landing are missing. Experts examine whether their disappearance is part of a cover-up.

Some think the waving US flag on the moon proves that NASA faked the lunar landing. Experts' quest for the truth leads to some of Hollywood's biggest names.

How will the universe end? Experts discuss the many possible ways that could spark the beginning of the end for the universe including when and why it would happen.

Jessica Chobot and Phil Torres investigate a strange phenomenon that has been haunting Mammoth Cave for generations. What will they discover?

Phil Torres and Jessica Chobot follow strange orbs of light into an active volcano in Washington. The team searches for answers about the unexplained.

How does a Dutch company make the world's fastest superyachts? And, how do they make new space suits that weigh and cost the fifth of the previous design?

How do planes take off and land on a beach at one of the world's oldest airports? And, how do they hand-make the national dress of Bavaria, lederhosen?

How do they catch the world's largest lobsters? How do they build the iconic chesterfield sofa? And, how do they capture the world's sharpest TV pictures?

How do they take a car from Siberia to the Sahara without leaving Germany? Plus, how do they hand craft a baseball glove that will last a lifetime?

How do they print over 10 million copies a day of the world's best-selling newspaper? How do they knit 32,000 pairs of socks a day at South Africa's biggest sock factory?

How do they produce 99% of America's raisins in California's San Joaquin Valley? Plus, how do they make the world's oldest type of paper?

Kevin Delaney and his team of experts show how explosive hydrogen peroxide can really be. Plus, combining ping pong balls with pressurised liquid nitrogen.

Kevin and his team of experts explore the amazing science behind rockets, using unconventional materials to power homemade projectiles to incredible heights.

Kevin and the team take to the streets to create a massive, swirling fire tornado out of kerosene. Plus, they dazzle onlookers with a rainbow coloured flamethrower.

Kevin and his team of experts use a race car to put a new twist on an old magic trick, and show what it takes to build homemade hovercraft.

Tory Belleci and Streetbike Tommy meet experts from the FBI's bomb squad to reveal the forensics and technology required to investigate deadly bomb threats.

Tory Belleci and Streetbike Tommy meet experts of the battlefield who recreate black powder blasts from the Civil War and experiment with this deadly explosive.

How will the universe end? Experts discuss the many possible ways that could spark the beginning of the end for the universe including when and why it would happen.