WILLIE WALKER will start in the pivotal number 10 shirt tomorrow - Gloucester's third different stand-off in three weeks.
Dean Ryan's Guinness Premiership leaders will make the trip to Harlequins with the former Otago Highlander in a new half-back combination alongside scrum-half Rory Lawson.
Walker slots in at stand-off because Ryan Lamb has slight bruising to his shoulder and Chris Paterson, who started against Bristol a fortnight ago, moves to the bench.
There are also returns for winger Lesley Vainikolo and full-back Iain Balshaw as Gloucester look to extend their five point advantage at the top of the table.
Walker will make his 10th appearance of the season in the Premiership tomorrow - his one try coming against Leicester back in September.
"Hopefully, we have learnt some lessons from the last time we had international players available," Ryan said, referring to the defeat against Bristol. "We suffered some basic problems then in terms of preparation and we are keen they don't happen again.
"Players needed to turn up on Monday and show me they wanted to be around and involved. There is no doubt we want to get on a bit of a run and find some form.
"We began that process by thinking our way out of some problems against Newcastle last weekend and we need to build on that tomorrow in what will be a very tough game."
Outside Lawson and Walker, Jack Adams and Anthony Allen continue their midfield partnership, while James Simpson-Daniel, who has 10 tries in 19 games in all competitions, will partner Vainikolo and Balshaw in Gloucester's back three.
Ryan has also made changes up front. Loose-head prop Nick Wood will make his sixth successive start and 17th in total alongside hooker Olivier Azam and tight-head prop Carlos Nieto.
Peter Buxton will move back into the second row alongside Alex Brown, which means Alasdair Strokosch, who started for Scotland against Ireland last Saturday, wears number six, Akapusi Qera comes in for Andy Hazell at openside and Luke Narraway wears the number eight shirt.
Hazell is ruled out with a slight neck injury which means Qera will make his 11th start of the season following his try against Newcastle off the bench last weekend.
"Balance is important and I think this is a side that has a lot of capability," Ryan said. "There is also a great deal of know-how and experience on the bench and at certain times they will also be crucial.
"We need to ensure our preparation is right and if we do that then we are capable of creating a threat against a lot of sides. Harlequins are a real threat and to pick off Saracens last Sunday was a very significant result for them - it will be a tough game."
On the bench, hooker Andy Titterrell will be joined by prop Alasdair Dickinson, lock Marco Bortolami and number eight Gareth Delve.
The three-quarter replacements are scrum-half Gareth Cooper, stand-off Chris Paterson and wing Mark Foster.
GLOUCESTER (v Harlequins, tomorrow, 2.45pm): Iain Balshaw; James Simpson-Daniel, Jack Adams, Anthony Allen, Lesley Vainikolo; Willie Walker, Rory Lawson; Nick Wood, Olivier Azam, Carlos Nieto, Peter Buxton (capt), Alex Brown, Alasdair Strokosch, Akapusi Qera, Luke Narraway. Reps: Andy Titterrell; Alasdair Dickinson, Marco Bortolami, Gareth Delve, Gareth Cooper, Chris Paterson, Mark Foster.
Gloucester meet the Exeter Chiefs for the fourth time in competitive action this weekend, this time in the semi-final of the European Rugby Challenge Cup. Director of Rugby David Humphreys told the local media this week that this is the sort of game that Gloucester want to be involved in on a regular basis and that he and his team are looking forward to it.
Following the 29-26 loss to Harlequins, club captain Billy Twelvetrees spoke of his disappointment that the Cherry and Whites were unable to cash in on the home side's indiscipline and lose a lead on Saturday afternoon.
Number eight Gareth Evans admitted to a collective feeling of frustration as Gloucester lost narrowly at Harlequins on Saturday, but insisted that there are plenty of positives to draw upon ahead of next Saturday's European Rugby Challenge Cup semi-final at home to Exeter.
Gloucester travel to the Stoop on Saturday afternoon to take on Harlequins in the Aviva Premiership. The Cherry and Whites make just two changes from last weekend's win over Connacht as they seek consistency and continuity in their play as Nick Walshe told the local media this week.
Speaking to GRTV after the final whistle, Tom Palmer praised the Cherry and Whites concentration and desire to hold on to a narrow 14-7 victory. The second row topped the tackle charts with 19 as he led the home team's resistance.
Supporters who are still to purchase tickets for Saturday's European Rugby Challenge Cup semi-final at home to Exeter Chiefs at Kingsholm (kick off 7:45pm) are reminded that Early Bird prices are only valid until 6:30pm on Thursday evening.
The Gloucester Wheelchair Rugby team travelled to Fenton Manor Complex, Stoke on Trent last Saturday to take part in the final round of the GBWR Super Series of the season, knowing just one win would be enough to crown them Division 3 Champions.