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.

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.

Following the world's last mountain gorillas.

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

The fortunes of America's wildlife icons in Yellowstone, the most extensive thermal area on Earth.

Mireya Mayor journeys to the northern Congo to witness the lifestyles of western lowland gorillas.

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.

A dog is not always man's best friend. Sometimes dogs are bad to the bone, destroying property both inside and out and generally misbehaving at every turn. Just how far can dogs push their owners and still get unconditional love? "Bad Dog!" answers that question with videos of animal antics -- and the reactions of the pets' owners -- that must be seen to be believed. The program also calls a timeout for other ill-mannered critters, such as cats, geese, turtles and monkeys.