A freezing night in Berlin. Silence. Mist. Breath steams above a gaggle of grey-faced men, collars upturned. An unbearable tension in the air. Binoculars trained across the River Havel from Wannsee to Potsdam. An officer reaches into the pocket of his greatcoat to take a bite of schnapps. Another smokes nervously. Then, at last, a light on the east side of the Glienicke Bridge.

The exchange is on. There is almost a sense of relief as the action begins. This is the moment in the spy film after the espionage is over, the mole exposed and the agonising denouement can begin.

On a roasting May afternoon, Wembley did not look much like Berlin in November, but there was a similar sense of tension, the working out of murky games, a victory that could not help but be compromised. The demands of integrity meant Southampton had to be punished, but their espionage has tainted the Championship playoffs. In the world of shadows, there are few moral absolutes, although a consensus seems rapidly to have emerged on Tonda Eckert.

The Hull owner, Acun Ilicali, said before the game he would take legal action if Middlesbrough were to be victorious – arguing that as Boro had not won their semi-final, but awarded Southampton’s place after their expulsion, they had no business being in the final. “Our legal team says we have to go for action, that’s for sure,” he told Radio Humberside. “We have no doubt about it.”

Perhaps Hull did have a case – certainly they had a point that they had been disadvantaged by having to prepare for two possible opponents, whereas both of those opponents knew who they would be facing – but, equally, it felt slightly unseemly. The Football League must have been relieved they did not have to find out how strong that case was.

At the final whistle, Ilicali dissolved into tears. His, too, is an unlikely, and not uncontroversial, story. He was a sports reporter who became a television celebrity in Turkey with a travel show he presented. He invested in other shows and became such a major media player that he has been one of Turkey’s 100 most taxed people since 2008.

If the uncertainty did hamper Sergej Jakirovic’s preparations, though, there was no sign of it. No side in the Championship had more possession than Boro this season and Hull essentially let them have the ball, denying them passing options in the final third. Although Boro had 13 shots, none of them were on target. Given Hull conceded 66 goals this season, more than relegated Oxford, that was a striking statistic. Jakirovic cites Jürgen Klopp and his dynamic hard-pressing football as his model; it’s fair to say he played against type here.

Jakirovic is the definition of a journeyman: as a centre-back he played for 19 clubs, three of them twice. As a manager, he is on his eighth position and he doesn’t turn 50 till December. He will become the first Bosnian manager in the Premier League.

The job he has done is remarkable. Last season, Hull avoided relegation to the third flight only on goal difference after burning through Tim Walter, Rúben Selles and Liam Rosenior in a year. They have been operating under a transfer embargo imposed for late payments on a loan fee to Aston Villa for Louie Barry and yet somehow dragged their way into the Premier League.

There will have to be large investment if this squad is to have a chance of matching the achievements of Sunderland and Leeds in staying up, but that is a consideration for another day. This was a joyful afternoon that, after all the intrigue and debate, will live in Hull memories for ever.

If Eckert, even in his absence, was the main character, the second-biggest was the temperature. It was an oppressive afternoon, so hot that long passages of play went by in a soporific daze and every slight knock was taken as an opportunity to take on fluids. Nobody could run, nobody could think. As a football match it was drab, featuring one shot on target – a gentle floater from Mohamed Belloumi – before Oli McBurnie’s winner, but as an occasion the stakes maintained a dreadful tension until the fateful error.

It was that sort of film. There were few moments of high drama, more an incessant intensity, a constant anxiety building to the dramatic finale. McBurnie was released by Sheffield United when they were relegated from the Premier League in 2023-24 and picked up on a free by Hull from Las Palmas. But he’s back from the wilderness, he’s crossed the bridge as an improbable hero and, for now, everybody can relax. For Hull, peering through the fraught night, this was mission accomplished.