If You're Listening with Matt Bevan

After 22 months Mueller's report has dropped. But it hasn't been made public - yet. US Attorney General Bill Barr has the report in his hot hands - and according to him - Mueller found no evidence of collusion. But who is Bill Barr? And can we trust his summary of Mueller's findings?

An undercover Australian journalist from Al Jazeera spent three years inside the National Rifle Association of America. He wasn't the only one trying figure it out. Simultaneously, a Russian secret agent was trying to infiltrate the NRA. She is now the only Russian secret agent behind bars for Russia's meddling in the election, and could hold the key to understanding Putin's plans

Affable Englishman Rob Goldstone was literally in the room for the infamous Trump Tower Meeting, and he was with Donald Trump the weekend of the mythical "pee tape". But when you look at the rest of the characters involved in the Trump/Russia saga - Republican operatives, Trump family members and Russian spies - Rob Goldstone seems like the odd man out. He puts a lot of his story down to accidents and misunderstandings, but is that all there is to it?

Everyone who meets Russian Ambassador Sergey Kislyak ends up in deep trouble. But what if that was the point? Robert Mueller seems to have found no evidence that the Trump campaign were willing participants in the criminal Russian effort to disrupt the 2016 election. But what if the Trump campaign were unwitting targets of a spy operation, led from the Russian Embassy Were they tricked into taking pointless but suspicious-looking meetings - which the media and FBI would discover and investigate?

When Julian Assange was arrested last week, the only camera to capture it was Russian broadcaster RT. It's the latest event in a long relationship between the Wikileaks founder and the state-sponsored network. Assange has denied working with Russian military hackers to influence the US election. But what does Robert Mueller know about Assange’s links to Russia?

Lawyer Don McGahn was on the Trump train from the beginning. But the dream job of White House Counsel quickly turned into a nightmare, as he slowly fell out of favour with the President. Then one night McGahn was forced to make a choice of historic proportions: help Trump potentially commit a crime or resign. McGahn has found himself the centre of attention, as his testimony to Robert Mueller implicates the President in possible obstruction of justice.

Robert Mueller has investigated the relationship between former Trump campaign manager Paul Manafort and Russian billionaire Oleg Deripaska. Deripaska is an aluminium tycoon with close links to Russian President Vladimir Putin. Manafort tried to funnel secret insider information about the Trump election strategy to him. Was that information then used by Russia to influence the election? The story behind the last remaining collusion question.

It's the meeting at a fancy wine bar in London that sparked the Mueller investigation. Some say it was a boozy, alcohol-fuelled drinking session where a clever spy tricked a Trump official into divulging information about Russia.