Dr. Michio Kaku believes there is nothing stopping us from building a holodeck straight out of Star Trek. He's on a mission to create an imaginary world indistinguishable from the real thing. At Rowan University, Michio experiences total immersion virtual reality as he takes on a T-Rex. Later, he goes on a patrol with the U.S. Army as he comes to grips with their omni-directional treadmill. Seth Goldstein at Carnegie Mellon explains how programmable matter will mean objects can shapeshift at the touch of a button. The only limits to a holodeck experience will be imagination itself.

Imagine a world ruled by artificial intelligence where humans have been wiped out. This is no sci-fi fantasy. We're fast approaching the moment when machines will be smarter than we are! We need a plan to stay on top and Dr. Michio Kaku is on the case. He's recruited help from some of America's top experts. Technology guru Marshall Brain thinks we may be only 40 years away from what scientists call 'The Singularity'. Michio considers AI researcher Ben Goertzel's proposal for a nanny artificial intelligence that will keep track of any rogue machine with a grudge against humanity. It's certainly one solution — but Michio's final design is even more audacious...

Dr. Michio Kaku is on a mission to save planet Earth. Nearly 90 percent of the rocks in space are big enough to destroy our civilization. And it's not a question of if they'll hit our planet, but when. He shows what would happen if we really did use nuclear weapons to blow up an incoming asteroid and comes up with a safer, rocket-powered solution. Kaku meets up with Harvard's Professor Brian Marsden, who explains how a massive comet could smash into Earth without warning. To deal with the multiple threats, Kaku takes a lead from Star Wars and designs a system of laser-equipped Death Stars to zap the space rocks before they hit us.

Behold, Dr. Michio Kaku's most ambitious plan yet — the construction of a new solar system. He meets Paul Butler of the Carnegie Institution who identifies 47 Ursae Majoris as our nearest suitable star. But with no Earth planets in orbit, it sure doesn't feel like our solar system. Gravity could be used to manipulate a moon into an Earth like position. But Kaku's thinking bigger than that. If he's building a whole new solar system for humanity, surely he should be able to harness the power of our new sun! So he comes up with an incredible plan to completely encircle the sun with a giant sphere, which will act as a huge energy collector. What's more, once it starts spinning we'll be able to settle on the inside and become a truly stellar civilization.

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.