1. Richard Hammond’s Engineering Connections: Bullet Train
2. Science

The zoo says goodbye to beloved pandas Bai-Yun and Xiao Liwu, as mother and cub prepare to return to China; Tembo the retired "Hollywood" elephant tries traditional Chinese medicine for her arthritis.

Anatomist Dr Alice Roberts follows a dinosaur exhibit from raw bones to colossal models.

After devouring all his tankmate's food, a hungry sea turtle finds a space to eat in peace; two beluga whales are welcomed to their new home.

The Coral Triangle contains more than three quarters of the planet's coral species, and the world's largest and smallest fish.

As 1960 approaches and the Mercury 7 return home for the holidays, a humiliating rocket launch throws the future of NASA into question.

Michael Mosley tries the first meal most of us enjoyed - human breast milk.

In Oran, resident Zaki Souffi goes shopping in the jedida market. He visits the home of the city's most eminent emigre, Yves Saint Laurent, and has a local snack of karantika.

Myth-busting meets natural history with Tim Warwood and Adam Gendle.

With added facts. A sweet beluga whale trains with staff to go on the 'whale scale'. Blacktip reef shark L2 is not eating normally and staff work to figure out why. See the first sea lion born at the aquarium.

A man recounts his life, from his childhood through his experiences in World War II, and the story of his self-sacrificing mother, who raised him alone.

With added facts: beloved Asian small-clawed otter Pinkie has a recurring bloody nose and the team must find out what is causing it. Feisty baby American alligators arrive at the aquarium and must learn to eat in an orderly way.

What would an alien civilisation believe in? Is God being worshipped somewhere else in the cosmos? We won't know until we make contact, but we can look for clues here on Earth.

Safari Park keepers prepare Aria the rambunctious black rhino for her new life on the open African Plains exhibit; zoo staff cares for 15-year-old legend M'bari the lion and his mate, Etosha.

Hunter the koala is ready for a mate; Jaws the Galapagos tortoise isn't feeling well; the Safari Park has not one but two baby giraffe calves that need to be hand-reared simultaneously.

The staff use laser-equipped cameras to determine just how long Trixie the whale shark is; a shy box turtle makes friends.

A new government agency called NASA hand-selects hundreds of military test pilots until a mere seven are named the Mercury Astronauts.

The Mercury 7 and their families come to understand the magnitude of their instant fame and the personal pitfalls that come with it.

A clandestine program investigating credible sources of the incredible - sightings that proof the existence of aliens ... or ... proof of an incredible new technology? The Advance Aerospace Threat Identification Program is a government black file dedicated to researching, tracking and identifying UFOs. In two thousand seventeen, news broke of a secretive government program investigating unknown aircraft flying into US airspace. AATIP is a twenty-two million dollar Black File. Even within the government, most don't know what they do. Are they capturing hostile spycraft, testing out latest technology, or something else? A series of recently released videos filmed by the DOD show a technology that scientists and aviation experts agree is beyond our capability and very possibly, something from beyond our world. Mike Baker looks into one of the most fascinating subjects of our time.