As the club prepared to leave its beloved Roker Park home after nigh-on a century, the series – broadcast in February and March 1998 – also detailed efforts to capitalise on the commercial possibilities opening up as the game’s top flight, then known as the Premiership, exploded in popularity.

When a letter from the BBC proposing the production landed on the desk of Lesley Callaghan, the club’s head of PR, she and the board saw it as an opportunity to document a “historic moment”.

“It felt like something important was happening with the growth of the Premier League, TV deals and construction of new grounds after the Taylor report [into the Hillsborough tragedy]. It was a chance to be part of that.

“We all felt there would never be a bigger story to tell. Everyone was working hard for the club and the city.”

Sir Bob Murray CBE, chairman at the time and now life president, says it was a chance to mark “a new beginning”, with the club floating on the London Stock Exchange to raise funds for the Stadium of Light – being built at Monkwearmouth where blackened miners had toiled for decades before their colliery was closed.

“It was a very testing time. There was no future at Roker Park. It was difficult for people to comprehend because of the emotion attached to it, but I knew it.

“We only turned over about £4m and were losing money. Although Roker had a capacity of about 22,500, we only sold out that season against Manchester United and Newcastle. There was no training ground.

“The club was finished as an operation. It needed to be fixed. The series was a chance to increase its profile.”