When Green's not transporting himself back in time for Grantchester, he can be found in any number of series that he hosts, many of which focus on his great passion for extreme fishing.

The passion began back in 1971, when he was 7 years old and on holiday with his family in the seaside resort town of Torquay in Devon, England. His father took him fishing, and it was the beginning of many trips and a special bonding experience. Green’s father sadly passed in 2009, “ironically when I was fishing,” he wrote in The Telegraph in October of 2021. “Although I miss him terribly, when I’m out on the water I am always with him.”

Green hosted his first season of Extreme Fishing with Robson Green in 2008, traveling to locations such as Costa Rica, the United States, South Africa, and more, then continued on with a spin-off series called Robson’s Extreme Fishing Challenge, which premiered in 2012.

“I’ve been lucky enough to make a career out of [fishing], too,” he said. “In my other day job, as an actor, I suspend disbelief and pretend to be other people, but when I’m fishing, it’s one of the few occasions when I can be me... I compare it to being at home. Home is not a house or a garden – it is a feeling, and I have always felt at home on the water.”

His heart may beat for fishing, but his adventures aren’t all focused on the sport. Green has also hosted a number of travel series, exploring coastal counties, his home county of Northumberland in Northern England, and beyond.

Starting in 2009, he hosted Robson Green’s Wild Swimming Adventure, where he ventured to the Tyne, a river in North East England, and in part two to the famous Scottish Highlands lake, Loch Ness. Other shows he's hosted include Robson Green: How the North Was Built, exploring the North of England’s industrial history; Tales from Northumderland with Robson Green; Tales from the Coast; Robson Green’s Coastal Lives; and Walking Hadrian’s Wall with Robson Green.

Green grew up knowing his father, also named Robson Green, was a hard-working miner and “the toughest man in the village,” he told The Guardian. Green used to wonder what it was about the coal mines that his father loved. “Even at a very young age I thought, well, that doesn’t look like a job designed for human beings,” he remembered.

But his father did, indeed, love it. “He honestly loved working with his mates every day and the camaraderie they shared. To be a miner you have to be brave, you have to be courageous, you have to be knowledgeable and you have to be strong. Later on in his mining career, he was a deputy, responsible for the safety of 55 men.”

So when Green learned at the age of 26 that his father had another passion, he was surprised, to say the least. Green's father, it turns out, had been a national ballroom dancing champion. “He won loads of trophies. I’m not sure why he was so quiet about his achievements," he said. "I did see him dance once on my 18th birthday and it was astonishing to watch this big, powerful man glide across the room like Fred Astaire.”

In an interview with MASTERPIECE during Season 5 of Grantchester, Green delved not only into his role in the series, but his life in the wild. When asked what fish each of his Grantchester co-stars would be, he thoughtfully had answers for each of them: Tom Brittney a sailfish (because of his athleticism); Al Weaver a mahi mahi (because he’s colorful and layered); Kacey Ainsworth a golden dorado (because it’s beautiful and really likable, and also happens to be the fish he likes most); and Tessa Peake-Jones/Mrs. C a grouper (because she’s dominant and there’s something hidden in her character).

But when asked about what fish he himself would be? ”I think I’d be like the salmon,” he answered. “I’ve traveled around the world, seen 130+ countries. I’ve been so privileged, but there’s no place like home. Like the salmon—it travels thousands of miles when it migrates, yet it finds its home water and migrates to the very spot, within a square yard, of where it was born."