This was a fascinating eye-opener into the world of pandas. There was a huge amount of fuss when pandas Tian Tian and Yang Guang arrived at Edinburgh Zoo from China last year.

This documentary, beautifully narrated by David Tennant, told the incredible story behind their journey.

The couple – known as Sweetie and Sunshine – got the star treatment as they moved from a panda reserve in China to their home for the next ten years, Edinburgh Zoo.

There was a time when China gave away pandas to promote international relations. Not any more. Sweetie and Sunshine will cost the zoo £600,000 a year in "rent".

Zoo vet Simon Girling and keeper Alison Maclean travelled to China to meet their new guests and learn how to care for them, as well as visiting the Wolong reserve where they are making efforts to introduce more pandas back into the wild.

It's taken five years to negotiate the transportation of the pandas to Scotland. And there's a lot to consider.

The pandas feed for 16 hours a day and the bamboo alone will cost around £70,000 a year. To pander to the pandas, a special enclosure is being built which is covered by CCTV.

They're real VIP guests. There is a leaving ceremony in China – complete with band, flowers, streamers and a troupe of dancers dressed as pandas. The crew of a special FedEx Panda Express plane are dressed in kilts and there's a press contingent waiting when the plane lands in Edinburgh. Woe betide Sweetie and Sunshine if they don't deliver a panda of their own to the zoo!

A fascinating story. The best moment? When a straight-faced Chinese reserve worker put on a panda costume to check young cubs they are hoping to release into the wild. They don't want them to recognise humans. It looked like something straight out of Monty Python.