It's like one of those great Horizon episodes from the 1980s or 90s, before all science docs started sounding as if they were written for overexcited seven-year-olds.

The two Voyager space probes are the subjects of this appropriately epic documentary, full of lavish visuals, brain-frying statistics and infectiously enthusiastic Nasa boffins.

It's rare for a film to make one swell with pride about something he or she had no direct hand in, but "The Farthest" accomplishes that feat with aplomb.

This is a documentary that, whilst being about space, ends up truly reflecting upon the human experience.