A new lion’s arrival sparks a conflict among Gorongosa’s dominant lions. Joyce Poole has questions about the mysterious behavior of the Gorongosa’s elephants, and Bob Poole tastes the danger of crop-raiding elephants. Joyce has a breakthrough with the elephants.

When Bob Poole returns to Gorongosa, he discovers a huge nesting colony of water birds. He resumes his search for the lion cubs that went missing. After many sleepless nights, he finally meets the park’s new cubs — the future of lions in Gorongosa.

From Episode 6 | Roaring Back | Wildlife cameraman Bob Poole takes a tour in a traditional dugout canoe through Gorongosa's flooded forest. Hear why he thinks Gorongosa is one of the greatest national parks in Africa.

From Episode 5 | Battle Lines | Ravaged by civil conflict, the park's elephants are wary. An elephant doesn't forget, but, in time, perhaps they can forgive. Elephant expert Joyce Poole meets the main matriarch, Provocadora, of Gorongosa's elephant family.

From Episode 5 | Battle Lines | Ant expert Leeanne Alonso digs into a tree's bark to look for ants. What she finds is a wonder of adaptive evolution: ants with legs too short to walk.

From Episode 5 | Battle Lines | Park Guide Jose Montinho grew up with scary stories about elephants. Now, he's learning how to understand them and conquer his childhood fear.

Bob Poole and a team of scientists estimate that the park may hold Africa’s largest croc population. Rappelling into deep gorges, they discover forests full of new species and unexplored caves, putting Gorongosa on the map as one of Africa’s last frontiers.

Bob Poole and the lion team find one of the cubs with a grave wound and race to save her. A massive relocation mission is launched to bring back zebra and eland — Africa’s largest antelope. Discover a hero who kept Gorongosa alive after the war.

From Episode 3 | New Blood | Park veterinarian, Rui Branco discusses what it takes to be a wildlife vet and help restore a park like Gorongosa.

From Episode 4 | Hidden Worlds | Cinematographer Bob Poole is ravaged by leeches while netting a river at night for juvenile crocodiles.

A recording of the echolocation calls of 8 species of Gorongosa bats (Rhinolophus landeri, R. simulator, Hipposideros caffer, Nycteris thebaica, Myotis bocagii, Miniopterus fraterculus, Neoromicia nana, Chaerephon pumilus) and 3 crickets (Homoeogryllus orientalis, Anaxipha sp., undet. Podoscirtinae). Bat calls were slowed down 100 times, crickets 10 times. Video courtesy of Piotr Naskrecki.

From Episode 2 | Elephant Whisperer | Meet croc expert Sven Bourquin, and hear why he thinks Gorongosa's crocodiles are so impressive.

From Episode 3 | New Blood | Hidden worlds are all around us, all we have to do is stop and look. Scientist Piotr Naskrecki shares his childhood stories about how he became so passionate for the world beneath our feet.

From Episode 5 | Battle Lines | What's it like to rappel into the unknown? Greg Carr, president of Gorongosa's restoration project, is about to find out as he abseils into the park's least explored depths.

From Episode 4 | Hidden Worlds | Plant expert Bart Wursten shows Tongai Castigo fairy-like insects on a tree. Bart describes how the tree works like a planet, supporting so much life.

From Episode 4 | Hidden Worlds | Beetle expert Bruno De Medeiros uses human excrement to bait his beetle traps.

From Episode 4 | Hidden Worlds | Wildlife cameraman Bob Poole and team go face-to-face with a spitting cobra that gets stuck in his car.

From Episode 4 | Hidden Worlds | Two reptile experts try their best to outwit and catch a lizard.

From Episode 4 | Hidden Worlds | Bird expert Greg Davies hears a lot more in a bird's call than a pretty song, and shows off his incredible skill. Watch as he reveals what these most extraordinary calls can teach us about an ecosystem.

From Episode 4 | Hidden Worlds | Meet Gorongosa's very own Tarzan, Harith Farooq. One problem: he has no head for heights. He'll have to overcome his fears to make a dizzying descent into a steep gorge.