The team sets out to discover what is behind our special bond with dogs. Liz visits researchers comparing dogs to wolves to see how domestication has shaped them.

The team looks at some of the biggest travel nightmares. Liz investigates what causes traffic jams, whether lane switching works, and how to beat travel sickness. Meanwhile Jem heads for his workshop to build his own solution to traffic jams: a home-made, man-powered aeroplane.

Jem dreams of flying under his own power by pedalling a homemade plane into the air. He explores why muscles get tired, and if he can boost his with beetroot.

The team reveals how life surrounded by wireless signals affects us. Howard Stableford looks at the health risks, and Jem explores electricity without wires.

The team looks at the science of crowds, discovering how architects control the flow of crowds and how people in them can co-operate subconsciously.

Liz asks how safe digital storage formats such as DVDs are, and looks at the Cloud. Maggie Philbin revisits phone security.

The team asks whether modern life is damaging our ears. Dallas explores how safety-conscious scientists are putting the noise back into driving.

The team investigates why petrol costs so much, and whether we can use science to make fuel for free. Plus, Liz experiences life on an oil rig.