After a hard start to the ODI series, Head has been in top form of late, with 96 in the Adelaide Oval ODI followed by unbeaten knocks of 85* and 44* in the KFC BBL elimination games to help the Adelaide Strikers team he captains to a first title.
England captain Eoin Morgan is enthused about taking part in worldwide cricket's first Twenty20 tri-series but doubts there is room in the calendar for it to become a regular feature. Jason Roy was dismissed early in the second over much to the joy of the Aussie supporters in the ground.
An economical Agar finished with 2-15 from three overs including a remarkable caught and bowled off his first ball.
For England there is plenty of overlap with the ODI squad, which is no surprise considering how aggressively Eoin Morgan's unit have attacked the 50-over game in recent months.
Malan, in contrast to his persevering efforts in the Tests, was playing a brilliant attacking innings, finding the cover boundary with particular relish, but wickets were starting to fall regularly and the run rate began to slow.
His second scalp was a far easier return catch from Sam Billings. England suddenly collapsed from being 94/2 to 137/9. Spinners proved to be their undoing as the duo of Agar and Maxwell picked 5/25 off five overs combined.
Maxwell and D'Arcy Short (30 off 20) - the top run scorer in the 2017/18 Big Bash League - blazed a third-wicket stand of 78 in eight overs, during which Maxwell was dropped by Hales on 40 at deep square and which ended when Rashid caught Short one-handed off his own bowling. There were celebrations galore as he had won it for his side single-handedly both with the bat and the ball.
The England star continued to turn heads as he blasted 50 from just 36 balls, including five fours and a pair of sixes. In the 20 over span, skipper David Warner used as many as seven bowlers.
It was all down to Chris Jordan and Mark Wood to push England to a semi-competitive total, as they put on 18 for the final wicket, with the Surrey all-rounder blasting the final ball of the innings for a big six, as England posted 155-9. Maxwell's hat-trick ball was wide of the leg-stump line - he would have been just the seventh man to have a T20 worldwide hat-trick.