CGI canine caper

The role of Buck – the canine hero at the heart of Jack London’s frontierland novel – is played here not by a real dog but by a human actor dressed up in a motion-capture suit, then turned into a big-hearted hound by visual effects. It wasn’t always convincing on the big screen but might work better at home in a family-friendly production that’s been stripped of some of its cruelty (but, be warned, not all) and in which Harrison Ford eventually turns up as a grizzled backwoodsman. Sky Store to buy, from Monday