We travel to Tbilisi in Georgia to witness a life-saving operation on a magnificent Asian elephant named Grande, who has a badly infected tusk. 3/3

Cameraman Mike Pitts and producer Adam Chapman travelled to the Falkland Islands on a tip-off that a pod of orca had learnt how to hunt naïve elephant seal pups when they first venture into the water. 7/10

Ben Fogle reunites with a former medical student living in the woodlands of Arkansas. Ben discovers the impact a series of injuries have had on his physically demanding wild lifestyle. 4/6

Gregg Wallace explores the factory that makes 700,000 toilet rolls a day and Cherry Healey gets the bum deal of following a flush through the sewers. 2/9

In the first instalment Joanna explores the incredible islands of Japan, before jumping on board the Trans-Siberian Railway into Russia. 1/3

We travel to Tbilisi in Georgia to witness a life-saving operation on a magnificent Asian elephant named Grande, who has a badly infected tusk. 3/3

This episode looks at the worst floods to occur along America's Mississippi River, as well as floods in New York City and from Germany's Elbe River. 10/10

Ben Fogle is reunited with seafarer Rick, who has moved on to pastures new since their original encounter. When Rick last appeared on the series, he was living off the coast of French Polynesia, but he has since made a fresh start on the Pacific island of Fiji. 5/6

Chris, Steve and Liz kick off a new series to explore the health of our oceans in three different areas: Baja in Mexico, the Bahamas, and Australia's Great Barrier Reef. 1/2