Newcastle have been English champions four times and won six FA Cups, but have not lifted silverware since the Fairs Cup in 1969.
However, their fans will be dreaming this is the year that long wait for a trophy ends.
Eddie Howe's side, beaten 2-0 by Manchester United in the Carabao Cup final in 2023, know they still have a lot of work to do to get back to Wembley, but the first leg in London could not have gone any better.
Indeed, history is on their side as since 1987-88 all eight away teams to have a two-goal advantage after a semi-final first leg have reached the final.
Isak, a striker long linked with a move to Arsenal, showed the Gunners what they were missing with an excellent performance which got him a goal and an assist as he provided constant problems for Gabriel and Saliba.
Jacob Murphy and Gordon also played their part again in Newcastle's resurgence, but everyone contributed in handing Arsenal their first home loss of the season.
Dubravka made an excellent save to deny Gabriel, with Newcastle's defending typified by last-ditch blocks from Dan Burn and Botman as they battled to deal with Arsenal's constant threat from inswinging corners.
Since a 4-2 loss at Brentford a month ago, the Magpies have beaten Leicester, Brentford, Ipswich, Aston Villa, Manchester United, Tottenham and now the Gunners.
That run has lifted Newcastle to fifth in the Premier League, in contention for a return to Champions League football after playing in that tournament last season, though they have no European football this campaign.
They now have an FA Cup tie and four league matches before they must focus on the second leg.
Newcastle fans will already be looking forward to 5 February, which promises to be a raucous evening at St James' Park, with them hoping to finish the job off and return to Wembley.