Documentary filmmaker Louis Theroux will make his return in Louis Theroux: Forbidden America, a new BBC series in which he will uncover how the internet and social media has changed American entertainment.

Among the groups of people he'll be meeting in the three-part series are adult movie stars, far-right activists and wannabe rappers, who are all increasingly using social media to spread their message.

The BBC's synopsis for the show reads: "In Forbidden America, Louis explores how online has collided with the real world, helping the far-right build solidarity, creating power shifts in the porn industry and seeing rap artists live-streaming feuds."

Speaking about the new series, Theroux said: "The world has gone through massive changes, in particular from the effects of social media.

"Far-right groups that have found new influence through gaming and streaming services.

"Porn performers have seen power shift to them as they've embraced creator-controlled apps and called out alleged predators in the industry.

"And in the rap world young men with big dreams are caught up in feuds and high-risk behaviour in the click-driven world of social media."

"These three documentaries were tough to make. They required delicate access conversations."