Talking About Trees review - friendships formed through film

★★★★ TALKING THROUGH TREES A tender documentary on returning cinema to Sudan

A tender documentary on returning cinema to Sudan

What’s the appeal of cinema? It can transport us to fantasy lands, or open our eyes to new perspectives. But one aspect that’s less discussed is how it brings people together. Going to the cinema is a social stimulus, a shared experience that sparks discussions and forges friendships.

Chris Packham: 7.7 Billion People and Counting, BBC Two review - is it too late to get population growth under control?

Campaiging naturalist surveys the damage we're inflicting on our overcrowded planet

We hear plenty of debate about climate change and its disastrous potential, but the ballooning growth of the world’s population may be the most critical issue facing humankind. Chris Packham thinks so (“it’s undeniably the elephant in the room,” he says, though lack of elephants is one of its many alarming symptoms) and in this documentary for BBC Two he criss-crossed the planet to show us the evidence.

How to Steal Pigs and Influence People, Channel 4 review - the arcane world of the online vegan influencers

★★★★ HOW TO STEAL PIGS AND INFLUENCE PEOPLE, CHANNEL 4 The arcane world of the online vegan influencers

Fascinating tale of zealous vegans and militant meat-eaters

Filmmaker Tom Costello’s opening question in this quixotic but fascinating documentary for Channel 4 deftly skewered the journey he was about to take us on. Was making change or finding fame more important? he asked, and by the end of the story it was crystal clear where the main protagonists stood.

Cornwall: This Fishing Life, BBC Two review - a precarious trade on the ocean wave

★★★★ CORNWALL: THIS FISHING LIFE, BBC TWO A precarious trade on the ocean wave

Can Mevagissey's seafaring traditions survive tourism and second-home owners?

Series about fishing have become a durable mini-genre, including the likes of Deadliest Catch and Saltwater Heroes. However, this new six-parter on BBC Two brings us much closer to home than Alaska or Tasmania, and probes into the lives of the fishing families of the Cornish village of Mevagissey.

DVD/Blu-ray: The Emperor's Naked Army Marches On

Extraordinary 1987 documentary upends expectations of Japan - and of the genre itself

When Sight & Sound compiled its “Greatest Documentaries of All Time” list five years ago, Kazuo Hara’s The Emperor's Naked Army Marches On came in at number 23 – proof, some three decades on from its 1987 release, that this remarkable film had stayed in the minds of filmmakers and critics alike.

Liam Gallagher: As It Was, BBC Two review - no expletives deleted in exhausting rock-doc

★★ LIAM GALLAGHER: AS IT WAS No expletives deleted in exhausting rock-doc

Is Liam the last great rock'n'roll singer or just tedious in the extreme?

Liam Gallagher knows exactly how "fucking fantastic… and fucking shit I am", and proceeds to tell us so for 85 minutes. This 10-year documentary project came about as a result of director Charlie Lightening’s friendship with Gallagher, formed as Oasis came to a predictable halt.

Heston's Marvellous Menu: Back to the Noughties, BBC Two review - ghost of food trends past

★★★ HESTON'S MARVELLOUS MENU Ghost of food trends past

An overindulgent but enjoyable romp through the 2001 restaurant scene

Heston Blumenthal, of triple-cooked chips fame, is a mad food scientist. Well, that’s how we’re introduced to him in Heston’s Marvellous Menu. Tonight’s BBC Two programme had a rather theatrical premise: a chef recreating the complete dining experience (menu, team, decor, diners) from a pivotal year in their restaurant’s history.

Citizen K review - real power in Russia

★★★ CITIZEN K Alex Gibney's documentary about real power in Russia

Putin and Mikhail Khodorkovsky are equally sphinx-like adversaries in Alex Gibney's revealing doc

Putin and Mikhail Khodorkovsky are “strong”, a Russian journalist considers. “Everyone else – weak.” This is essentially Khodorkovsky’s opinion, too, after the former oil oligarch’s decade in a Siberian jail for suggesting the President was corrupt to his face on TV.

How They Built the Titanic, Channel 5 review - the great liner revisited again, but why now?

★★ HOW THEY BUILT THE TITANIC, CHANNEL 5 The great liner revisited again, but why now?

It's always a great story, but this didn't tell us anything new

The appalling fate of the allegedly unsinkable liner Titanic in 1912 has fuelled endless feature films and documentaries, not to mention a dismal drama series by Julian Fellowes (there was also a proposed Titanic II vessel which would have been built in China, but which remains mysteriously un-launched). However, it’s difficult to see why this film has appeared 107 and a half years after she sank.