The 2015 RBS 6 Nations will live long in the memory, not least because of a nerve-jangling final day that began with four teams still in the hunt for the title.
It all began in Cardiff six weeks earlier, when England and Wales set the tone for a thrilling Championship.
A second-half comeback - kick-started by Jonathan Joseph, who would go on to shine throughout the competition - earned England a 21-16 triumph and a measure of revenge for their chastening defeat on the same turf two years earlier.
Ireland and France also began with victories before facing one another in round two, when Jonathan Sexton kicked the men in green to victory.
England, meanwhile, made it two from two as a pair of Joseph tries helped see off Italy and Scotland ran Wales close at BT Murrayfield in a 26-23 defeat.
There was more heartbreak on home soil for Scotland, who lost 22-19 to Italy, in round three as Wales picked up a second win in as many games, at France's expense.
But the biggest clash of the weekend was at the Aviva Stadium, where Robbie Henshaw's try ensured England tasted defeat for the first time in 2015.
Ireland soon saw their unbeaten record slip, however, with a 23-16 defeat in Wales while England beat Scotland and France shut Italy out for a 29-0.
That left Ireland, England and Wales on six points with France on four and, with all three round-five clashes taking place on the same day, a nail-biting finale was on the cards.
Wales were first up and they struck an ominous blow, not just moving to eight points but also boosting their points difference with a 61-20 triumph in Italy, George North grabbing a hat-trick.
With a 20-point gap to bridge, Ireland did enough in Scotland - Paul O'Connell among the tries in his final RBS 6 Nations game as Joe Schmidt's side won 40-10.
Attentions then turned to Twickenham, where England needed to beat France by 26 points or more to deny Ireland back-to-back Championships.
A high-octane encounter kept everyone entertained, with 12 tries in total, but a 55-35 win was not enough for the Red Rose and celebrations began in the Scottish capital.