90% of the rocks in space are big enough to destroy civilization. And it's not a question of if they'll hit - it's a question of when. Dr Michio Kaku is on a mission to save planet Earth.

Its Dr. Michio Kaku's most ambitious plan yet: the construction of a new solar system. A giant sphere encircling a star, with new stellar civilization living on the inside. Its not sci fi; it's Kaku's vision for humanity's future.

The aliens are coming! It's the cry at the heart of hundreds of sci fi movies - but what would we do if a hostile alien race really were intent on invading? Earth must be prepared and Dr. Michio Kaku has a plan.

Do aliens really exist? With as many planets in the universe as there are grains of sand on Earth, most experts agree - finding extra terrestrials is just a matter of time. Michio Kaku is on a mission to make first contact.

Dr. Michio Kaku brings physics to bear on the most iconic scene in sci fi and designs a star fighter that could blow up a moon-sized Death Star.

In sci fi, the most destructive force in the universe is also the key to traveling to a whole host of mind-blowing destinations. Dr. Michio Kaku sorts fact from fiction and work out how to travel through a black hole...and survive.

Science fiction is full of terrifying humanoid machines with power to crush any opponent. But could we one day build our own army of superhuman cyborgs? Dr. Michio Kaku thinks a cyborg army could assemble sooner than you think.

Imagine a world ruled by machines where humanity has been wiped out. This is no sci-fi fantasy; machines will be smarter than us. Dr. Michio Kaku is drawing up a plan to save the human race.

Dr. Michio Kaku believes we can build one of sci-fi's most imaginative creations: Star Trek's Holodeck. He's on a mission to create an imaginary world indistinguishable from the real thing.

According to Hollywood, evil robots are all around us, disguised as cars and trucks. But what mechanical power allows a Camaro to stand and move like a human? Michio Kaku is on a quest to build a real shapeshifting Transformer.

Can Les Stroud survive a week in the Sonoran Desert alone, with no food, shelter or survival-gear - and just one bottle of water?

Les tries to survive seven days in the north of Baffin Island. A hunk of uncooked seal-liver, some oil-rich blubber for heat, a seal-hook, three matches and a knife is all he'll have to sustain himself for one very cold week.

Join Les Stroud as he's airdropped onto a snow-covered peak in the Canadian Rockies. He'll have to survive in the desolate environment for seven days using only his wits and a broken camcorder.

For a week Les Stroud will have to survive in a harsh snowy wilderness with only an axe, a multi-tool and a single blanket to aid him.

Stranded in the canyonlands of Utah, Les Stroud has only scavenged bike parts, a multi-tool, a magnesium flint-stick and an old energy-bar to help him survive for seven days.

With no food and a bare minimum of equipment, Les Stroud attempts to survive a week adrift in an inflatable life raft off the coast of Belize.