Mitchell, who has not played since the summer due to a neck injury, came on just after half-time and led a Saints comeback after Gloucester had led 22-7 at the break.
However, Gloucester hung on to end Northampton's unbeaten home run in the Premiership of 13 wins. And fittingly, Gloucester's only points of the second half came from man-of-the-match Santi Carreras.
His late penalty put the match beyond Saints after his first-half display had brought two tries, two conversions and a penalty.
Gloucester demonstrated their intent from the very start to make up for their wretched last trip here last season when a weakened team lost 90-0.
There was going to be no such scoreline this time and Carreras had 40 minutes to remember.
He might even have scored a hat-trick of tries but had to settle for two.
Only a knock-on in the lead up denied him a third try at the end of the half in which he scored two tries and kicked two conversions and a penalty.
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Denne historien er fra December 01, 2024-utgaven av The Rugby Paper.
Start din 7-dagers gratis prøveperiode på Magzter GOLD for å få tilgang til tusenvis av utvalgte premiumhistorier og 9000+ magasiner og aviser.
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Gallagher's late brace proves key for Caldy
CALDY built upon recent improved performances against London Scottish and Ealing to record a bonus point win against fourth placed Nottingham in a thrilling battle at Paton Field.
Leicester gunning to take down a legend
MICHAEL Cheika is aiming to take down a French icon as his Tigers attempt their Champions Cup mission impossible in Toulouse today and upset his children in the process.
Charnock the class has to end Havant resistance
A MUCH improved second-half performance saw Westevencombe Park tually overcome a spirited Havant side who looked like providing an upset for much of the game.
Quins turn on style to rip Sharks apart
A STORMING second-half mance saw perforQuins romp to a seven-try victory on the road.
Williams is poised to shift up a gear
TEDDY Williams will be looking to put his international disappointments behind him now his remarkable shift this season has been rewarded with a Wales call-up.
Mitchell back to his best and ready for battle
ALEX Mitchell is now eight games into his injury-delayed season and feeling full of energy for the Six Nations campaign ahead of him.
Borthwick: It's time to put our foot down
STEVE Borthwick insists he has come up with a solution to problem England's in closing out matches be even quicker out of the blocks in the upcoming Six Nations.
Watson: I had to quit, I was in so much pain
AS Anthony Watson trudged off five minutes into the second-half in Leicester's match at Sale in December, he knew deep down that his career was over.
Seabrook hat-trick as Saints edge a thriller
A STIRRING contest ended in Saints scrambling heroically to gain a last 16 home tie and gallant Munster facing a knockout tie on the road.
Barritt backing the new boys
BRAD Barritt won the Champions Cup three times with Saracens and believes the club are on course to be a powerhouse in the competition again.
