Image source, Getty Images
Image caption,West Indies struck 16 sixes in their successful chase of 219
Ffion Wynne
BBC Sport Journalist
Fourth T20, St Lucia
England 218-5 (20 overs): Bethell 62* (32), Salt 55 (35); Motie 2-40
West Indies 221-5 (19 overs): Lewis 68 (31); Ahmed 3-43
West Indies won by five wickets; England lead series 3-1
West Indies pulled off a sensational run-chase of 219 to earn their first win of the series in a thrilling fourth T20 in St Lucia.
Openers Evin Lewis and Shai Hope blasted 136 from the first nine overs, before they lost three wickets in as many balls to allow England back into contention.
Rehan Ahmed had Lewis caught for 68, Hope was run out for 54 and Nicholas Pooran was bowled for a duck, but captain Rovman Powell's 38 from 23 balls again shifted the momentum in the hosts' favour.
Powell's dismissal in the 17th over helped England regain some control, only for Sherfane Rutherford to hit back-to-back sixes in the penultimate over to seal a five-wicket win.
England's 218-5 was set up by Phil Salt's 55 - his seventh T20 score of 50 or more against West Indies - in explosive partnerships of 54 with fellow opener Will Jacks and 48 with Jos Buttler, who made 38.
Jacob Bethell, 21, then continued his eye-catching start to international cricket with a 22-ball fifty and an unbeaten 68, including five sixes, as England seemed to make the most of a flat pitch having lost the toss.
However, Lewis and Hope responded with class to the harsh treatment their bowlers received, reaching their half-centuries from 26 balls and 23 balls respectively.
Powell's departure and a couple of economical death overs from Saqib Mahmood and T20 debutant John Turner sent a few nerves through the West Indies' dugout but Hope and Lewis' dynamic stand ensured they were comfortably ahead of the run rate, Rutherford eventually finishing on 29 from 17 balls.
The T20 leg of the tour concludes with the fifth T20 on Sunday at the same venue, with England having already sealed a series win by winning the first three matches.
Windies respond to series defeat in style
With the series scoreline reading 3-0 and their bowlers having just conceded 218, few would forgive West Indies for feeling rather drained when beginning their mammoth chase.
But instead, they responded with fearless, breathtaking batting - starting with a six-over powerplay of 69-0 which lit up the stunning St Lucian skies.
The left-handed Lewis bludgeoned seven sixes in his 31-ball knock, taking a particular fancy to all-rounder Liam Livingstone, who conceded 30 from his one over.
Meanwhile, Hope managed to ooze class and display exquisite timing while maintaining a strike-rate of 225, with England's relatively inexperienced bowling attack struggling for answers in the absence of Jofra Archer and Adil Rashid.
Hope even faced a maiden over from Saqib Mahmood in the powerplay, who was the only England bowler to concede less than 10 runs per over with his 1-24.
The 10th over changed the complexion of the game with Lewis caught on the leg-side boundary, Hope was dozily run out having set off for a risky single and then Pooran was bowled by Ahmed's googly, the leg-spinner eventually finishing with 3-43.
But Powell's mature knock ensured England could not settle as he bravely continued to target Ahmed, doing the bulk of the damage in a recovery from 136-3 to 172-4 with Shimron Hetmyer, who only scored seven.
The equation was 23 from 21 balls by the time Powell fell lbw to Turner, which was achieved with relative ease by Rutherford and Roston Chase to complete a perfectly-executed chase.
Exciting Bethell shines again
Image source, CricViz
Image caption,Jacob Bethell struck his second international T20 fifty in just his sixth match
Despite the eventual defeat, Bethell's second T20 half-century added more weight to his ever-growing reputation as one of England's most exciting talents.
He followed the platform laid by the experienced Salt and Buttler with exceptional maturity, ensuring the tourists did not waste such a dominant start to the innings which included reaching 100 in the first nine overs.
He started quite cautiously with the best view of Buttler's cameo, settling in to watch the captain go through his full repertoire of tricks such as ramps over the keeper and back-foot punches through the covers.
When Buttler hit a reverse-sweep straight to short third in the 13th over for 38, England were in a commanding position at 129-3 - but with Sam Curran at six and then a relatively long tail, West Indies still had a chance to restrict the damage further.
But Bethell took ownership of the situation, especially when Livingstone fell for four, batting with astonishing confidence for a man playing in just his sixth international T20.
No area of the ground was safe as Bethell audaciously shuffled around the crease, allowing him to slog-sweep the spinners and blast the seamers down the ground with equal brutality.
Curran added 23 from 14 balls as the pair smashed 63 from the final five overs, with seamer Alzarri Joseph's 1-33 an outlier in West Indies' struggling attack.
It was another statement knock from Bethell, who has given England's batting a very welcome boost with the likes of Harry Brook, Jamie Smith and Ben Stokes to potentially come back into the middle order.
'As good as you'll see in a run chase' - reaction
West Indies captain Rovman Powell: "The guys were a little bit more committed today and the toss fell in our hands. It's been a series where once you win the toss, you seem to win the game but the guys played well."
England captain Jos Buttler: "It was an excellent wicket and we got off to a great start with our openers putting them under plenty of pressure.
"We thought we needed at least 220 and then their openers played exceptionally well too."
Ex-England opener Jason Roy on TNT Sports: "From start to finish, that is as good as you're going to see in a run-chase - from any side."