BBC Earth

The strategies used by animals to find and defend their mates in the grasslands of Namibia, the Serengeti and Australia. Here, mating strategies are on show for all to see.

Mist swirls around the base of Shanghai's skyline. From the city, tigers and monkeys seem as unreal and distant as dragons and mermaids emerging through the mist. Yet they exist.

Ash hikes Helan Mountains to Guidegou Wall, explores Suyukou rock art, visits Yinchuan market, plunges into the Yellow River, and ends in Qilian with a Tibetan yak farmer.

Robson is joined by his footballing hero, Alan Shearer. The pair go mackerel fishing off the Northumberland coast, spot dolphins in the wild and go flying in vintage aircraft.

Robson joins singer KT Tunstall in her home territory of Fife as they explore the beaches of her childhood near St Andrews, followed by a sea shanty workshop and jewellery making.

Michael cleanses Stockholm's frozen depths, tackles the humble herring, reinvents himself as a glacial Michelangelo, and investigates the sinking of a mighty warship.

Mist swirls around the base of Shanghai's skyline. From the city, tigers and monkeys seem as unreal and distant as dragons and mermaids emerging through the mist. Yet they exist.

Nazare in Portugal is the site of the biggest ocean waves ever recorded on Earth. To understand what creates these monsters, we use specialist jet-ski cameras to ride the waves.

After meeting several electric eel attack victims and hearing stories of people who lost their lives, Cyril is determined to catch the biggest one possible and measure its voltage.

The team enter the Serengeti where lions roam free and danger is always near. With water running out, their final challenge awaits.

Griff hits Memphis to trace the roots of blues, soul, and rock'n'roll on the banks of the Mississippi.

Ben meets Niall, who rescues and cares for street dogs in Koh Samui.

After meeting several electric eel attack victims and hearing stories of people who lost their lives, Cyril is determined to catch the biggest one possible and measure its voltage.

The team enter the Serengeti where lions roam free and danger is always near. With water running out, their final challenge awaits.

Ben meets Niall, who rescues and cares for street dogs in Koh Samui.

After meeting several electric eel attack victims and hearing stories of people who lost their lives, Cyril is determined to catch the biggest one possible and measure its voltage.

The team enter the Serengeti where lions roam free and danger is always near. With water running out, their final challenge awaits.

Robson is joined by his footballing hero, Alan Shearer. The pair go mackerel fishing off the Northumberland coast, spot dolphins in the wild and go flying in vintage aircraft.

Robson joins singer KT Tunstall in her home territory of Fife as they explore the beaches of her childhood near St Andrews, followed by a sea shanty workshop and jewellery making.

Griff hits Memphis to trace the roots of blues, soul, and rock'n'roll on the banks of the Mississippi.

Mist swirls around the base of Shanghai's skyline. From the city, tigers and monkeys seem as unreal and distant as dragons and mermaids emerging through the mist. Yet they exist.

The team enter the Serengeti where lions roam free and danger is always near. With water running out, their final challenge awaits.