Matt Damon and Scarlett Johansson team up for 'true story'

Among the offerings at the box office this Christmas is the family film We Bought A Zoo.

It is a feel-good drama with a cast that includes two big American stars: Matt Damon and Scarlett Johansson.

As Tom Brook reports, the film has its roots in reality.

Talking Movies is broadcast on BBC World News on Saturday at 13:30 GMT and is repeated on Sunday at 00:30, 07:30 and 20:30 GMT.