In the fourth ODI, Cardiff beat the rain and a thrilling contest ensued, as England beat Australia to level the NatWest Series at 1-1 by three wickets with three balls to spare and a game to play.
Australia were put in to bat first by the home side, and despite losing early and late wickets cheaply, they posted 227 all out in their innings, propped up by a feisty and well-constructed 87 from George Bailey.
In response, England began dreadfully, as Clint McKay took an outstanding hat-trick which accounted for Kevin Pietersen, Jonathan Trott and Joe Root.
But slowly they dragged themselves out of trouble, with Michael Carberry and Eoin Morgan both scoring half-centuries, and youngsters Jos Buttler and Ben Stokes setting up the thriling finale.
The two sides meet in the decider on Monday at Southampton.
Here's the story of how the match unfolded.
England began in style with Steven Finn striking to remove Aaron Finch with the first legal delivery of the day. Boyd Rankin was sharp bowling in tandem with Finn and added the scalp of Watson.
The hosts persisted with seam in conditions which saw the ball nibble in the air a touch, and reduced Australia to 57-4 with captain Michael Clarke in the hutch.
But Australia were not beaten, with Bailey at the heart of the recovery. He worked purposefully, first with Adam Voges (30) and then Matthew Wade (36) to get the game back in the balance.
From 209-5, however, the collapse began. Once Wade fell, there was little support for Bailey and James Tredwell, who finished with 3-53, doing his bit to mop up the tail and leave Australia all out for 227, eight balls short of their full allocation of 50 overs.
England began the chase as favourites, but McKay's second over ripped the heart out of their batting.
He bowled three good balls to three good batsmen—Pietersen clearly beaten lbw, before Trott and Root both edged to the slips.
It slowed the innings to a crawl as England sought to rebuild, but under pressure, Carberry and captain Morgan managed to do so at a gentle pace.
When both reached their fifties, it appeared as if the game had turned back the hosts' way, but both fell soon after—Morgan bowled by Watson for 53 and Carberry cleaned up by Coulter-Nile for 63.
Who will win the decider?
Ravi Bopara's ugly innings ended on seven, and England were tottering once more at 144-6.
But Buttler and Stokes came together and put together a superb partnership.
Stokes was the foil, dismissed with the target in sight with 25 runs to his name. McKay was the man once more, and three dot balls left England requiring 9 to win from 8 balls.
Buttler, the aggressor who had powered to a half-century, was on strike for the final over to Mitchell Johnson.
He flipped the first ball over midwicket for six, leaving just a single for victory. But he instead drilled a four straight down the ground to seal the triumph, and finish unbeaten on 65 from 48 balls.
Here's the scorecard, as given by the BBC.
Australia Innings 227 all out (48.2 overs)
|S Marsh||c Buttler||b Stokes||25||57||40||5||0|
|Watson||c Buttler||b Rankin||6||16||11||1||0|
|Bailey||c Buttler||b Rankin||87||138||91||5||3|
|Wade||c Carberry||b Tredwell||36||54||40||3||0|
|Faulkner||run out (Trott)||1||2||3||0||0|
|Extras||0nb 3w 1b 3lb||7|
|Total||all out||227||(48.2 ovs)|
|Fall of Wicket|
England Innings 231 for 7 (49.3 overs)
|Trott||c Finch||b McKay||0||1||0||0|
|Root||c Watson||b McKay||0||1||0||0|
|Extras||0nb 4w 0b 8lb||12|
|Total||for 7||231||(49.3 ovs)|
|Fall of Wicket|