Rachel Hogan and her team fight for a gorilla's life after he contracts a deadly disease; Dr. Sheri Speede investigates a tip that locals are illegally keeping a chimpanzee as a pet.

Dr. Sheri Speede and her team set out on a secret mission to rescue two chimps being kept as pets that are starving and living in terrible conditions; a baboon suffers a serious injury during a violent leadership challenge.

A British orthopedic surgeon visits to repair a chimp's wrist and is shocked by his surroundings; Dr. Felix Lankester seizes reptiles being trafficked for their meat.

Dr. Felix Lankester races to save a gorilla with chronic intestinal problems that have resulted in massive weight loss; a chimp with a bent wrist must take a frightening journey into town for an X-ray.

Four gorillas continue their journey back to Cameroon from Malaysia; a small chimp is attacked by a rival male; Dr. Sheri Speede works with a chimpanzee that suffers psychological damage from being raised as a pet.

Dr. Felix Lankester prepares for the arrival of gorillas that are returning to Cameroon after being taken illegally and placed in a Malaysian zoo; Dr. Sheri Speede must operate on a chimp riddled with flesh-eating maggots.

A volunteer takes on the demanding job of being a surrogate mother to a baby gorilla that lost her entire family; Paul Tendem works to change a community's outlook on bushmeat trade.

Rachel Hogan and her team race to rescue a chimpanzee that's been stuck in a tree for 24 hours without food or water; Dr. Sheri Speede must operate on a chimp with a serious injury that could affect the rest of his life.

After two chimpanzees escape, a team of expert trackers must locate them before they hurt locals; Dr. Felix Lankester investigates three cases of chimp attacks; an 8-month-old chimp must learn to trust a new volunteer.

Dr. Sheri Speede and her team rescue a chimp being kept as a pet in inhumane living conditions; Dr. Felix Lankester takes in a cargo of parrots with a street value of over $1 million that were set to be illegally smuggled.

Dr. Felix Lankester and his team face disaster when two chimps escape, putting the public at risk of a dangerous rampage; Rachel Hogan works with a traumatized infant gorilla to prepare her to interact with other infants.

Rachel buys a pregnancy test for her oldest gorilla, Gerry; Shufai walks into the gorilla enclosure.

Babila Tafon and Talila Sivan fight to save Caroline's life; a new vet arrives.

The Limbe Wildlife Center receives an adult baboon tied up in a tiny cage and a female chimp chained to a log.

Sheri Speede tries to spread the message to stop eating chimps and gorillas with music; one chimp escapes.

Sanctuary manager Rachel Hogan is terrified to give a speech; Miko gets a surrogate mother.

Chimpanzee Yao rejects her baby after being separated for a day.

Yao and her baby Miko escape from Mefou National Park; Shufai leaves Rachel forever.

Vet Sheri Speede appeals for help with Nino; Shufai begins his separation from Rachel.

Stories of West Africa's illegal bush meat and pet trades; the 4-year-old chimp Nino bonds with his vet.

Baby gorilla Shufai has a seizure; an illegal owner of a chimp escapes incarceration.

At the Jane Goodall Institute's Chimp Eden Sanctuary in South Africa, rescue director Eugene Cussons leads sometimes dangerous missions to save abused and neglected chimpanzees and rehabilitate them.

Animal rescue centers who rescue, care and rehabilitate sick, injured and orphaned wildlife.

This documentary explores the world of wild elephants in Kenya's Samburu National Reserve. Researchers from the conservation project Save the Elephants, notably the father-daughter team of Iain Douglas-Hamilton and Saba Douglas-Hamilton, follow the intimate stories of individual elephants as they raise their families, forge alliances and fight for survival.

If it's weird, true and freaky and it involves animals, you'll see it on this series, a frenzied documentation of amazing caught-on-tape moments and stories in a world where only the fittest survive. Whether attacking from above, or emerging from the depths, nature's most terrifying confrontations gone awry prove that in the animal kingdom, anything is possible.

Comedian Rachel Reenstra takes viewers around the world to encounter a variety of animals and discuss their behaviors with experts. But why a comedian who admittedly knows little about animals? Because she says she always makes a point of observing human behavior (helps with the jokes), and here the aim is to gain even more knowledge about how people interact with one another by examining how it's done in the animal world.

Jeremy Wade is not a fisherman; he's an "extreme angler" in search of the biggest and most dangerous freshwater fish, the kind with a taste for human flesh. This action-adventure series also features Wade illustrating how these river monsters are constructed to kill.

Owning exotic pets is more common than one might think. Recognizing the dangers of such ownership sometimes isn't as common, as documented in this miniseries. Each hourlong episode features owners of such pets as venomous reptiles, deadly big cats and chimpanzees sharing their experiences and the reasons why they feel a kinship with dangerous creatures. Animal authorities and experts on human behavior also weigh in with their opinions and analysis.