Going to a cannabis factory with your mum doesn’t sound like a fun day out. But it’s the sort of mischief Russell and Ninette Howard get up to as they return to the States for another run of their US road trip. The first port of call is Portland, Oregon, where recreational use of cannabis has recently been made legal. The duo embark on buying it, smoking it and even eating it - with mildly amusing consequences. Russell seems eternally perplexed by and slightly exasperated with his dear mum, who frequently upstages her son with scene-stealing one-liners. When it comes to trying the drug, for example, she has one key question: “Will it make my bunions stop hurting?”

The comedian and his mother head to Las Vegas to help judge the Mrs Globe Beauty Pageant, but Russell must first understand what it takes to be a beauty queen.

Russell and his mum are enrolling in the Rock and Roll Fantasy Camp, where they have 48 hours to become full blown guitar heroes and perform their first ever gig in the heart of Hollywood.

The comedian and Ninette head to cowboy country, where they saddle up for a mission to become real life ranchers.

The comedian and Ninette head to Naples in Florida, to try to find out why its was voted the happiest city in America.

It's the 4th of July so Russell and his mum, Ninette, are visiting an All-American State Fair in Indiana to join in the celebrations. However their Independence Day is going to be anything but traditional as they have been invited to run away with the circus for the weekend and join an old fashioned American Side Show.

Russell and his mum Ninette have a full backpacker blowout on the ultimate rave island Koh Phangan, Thailand. They squeeze in the gap year they never had in to one week, drinking mystical buckets of booze, Djing at jungle parties and going full hippy at a mass love-in breathing ceremony.

Russell and his mum have arrived in Japan. They're stepping back in time to become the ultimate assassins: Ninette is going full Ninja, despite her camel toe, and Russell is throwing on a nappy and getting neck deep in some Sumo man-boob, as well as massacring some teeny tiny trees.

Russell and his mum, Ninette, are in the City of the Future. They're in High-Tech Seoul in South Korea and are taking control of and corrupting a Mega-Robot, joining a crew of cosplayers as a drug addled hedgehog and a pint-sized plumber as well as going on their own Virtual Killing spree across the city.

Russell and his mum Ninette have arrived in Vietnam. While in the capital of Hanoi, they taste local delicacies, create melodies with a classically trained wizard and get involved with water puppetry before heading away from the hustle and bustle of town to compete in a rural Olympics.

Russell and his mum are in Mumbai, the City of Dreams. Their new mate Alekh is getting them to Act. Act. Act. Bollywood style, share their bedroom secrets with Mumbai's oldest sexpert and meet the record breaker who will put them off chocolate sauce for life.

Russell and Ninette have arrived in Northern Thailand, Chiang Mai to commune with nature - they visit a sanctuary to give some TLC to rescue elephants, are faced with milking deadly cobras and create their own jungle crib.

Russell and Ninette are getting spiritual in the Holy City of Pushkar in India. Their Cosmic guide is a Barber who is out of this world. He's taking them on a journey of enlightenment via a rat temple, the festival of Holi and one hell of a massage that teaches them the true meaning of 'RELAX!'.

Forget Gangnam Style, Russell and Ninette are in South Korea and are doing it Oppan Howard style. They are in Seoul and getting fully involved in the music phenomenon of K-pop and transforming themselves into the first and possibly last mother and son K-Pop duo...

Russell and Ninette are in Tokyo but ignoring the usual tourist traps, they're heading underground and embracing the truly weird and wonderful side of this metropolis. They're meeting some magical maids, renting some mates and Russell's having a go at being a gigolo at one of Tokyo's infamous Host Clubs.

It's Chinese New Year so obviously Russell and his mum Ninette are in... Thailand. Chinese New Year is massive in Thailand and the Howards are getting fully involved in the celebrations of the Year of the Dog. Along the way they're sampling some of the more unusual activities Thailand has to offer before literally chasing the dragon in the New Year parade.

Russell and Ninette are in Kerala in India, they're embracing the Southern states' traditions, both old and new. From climbing trees to get their hands on some booze, pouring oil on their heads to raise their IQ and trying out the ancient performance artform of Kathakali to tell the story of Star Wars.

The Howards are in Japan for Ninette's 60th Birthday and in this amazing country Russell has set her a challenge: come up with a birthday bucket list including all the incredible things she would love to do. Ninette's beautiful mind has not quite delivered a list tailored for the land of the rising sun so they're off to break a world record with her arse, find the northern lights in the far east and milk a cow...