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Newcastle have lured former England international Andy Goode out of retirement to help fill the void left by injured half-backs Mike Delaney and Ruki Tipuna.
Goode, 35, was forced to quit due to injury in September, while the Falcons have also signed scrum-half Jamie Booth from New Zealand side Manawatu Turbos.
Both players have signed three-month contracts with Newcastle following injuries to Delaney and Tipuna, who have both been ruled out of action until the spring.
Former Leicester, Saracens, Wasps and Worcester fly-half Goode, who played 17 times for England between 2005-2009, told the club's official website: "I'm looking forward to the challenge after having four months to recuperate and let my body recover.
"It's a short-term opportunity but I want to do as much as I can for the Falcons as I have a huge amount of respect for Dean, who I go back a long time with and who gave me my first opportunity at Leicester 17 years ago."
Both Goode and Booth, who attended Palmerston North Boys High School, could make their debuts in Newcastle's home against Bath on Saturday.
Newcastle director of Rugby Dean Richards said: "We're delighted to welcome Andy and Jamie to Kingston Park, although there is obviously disappointment that they come through injuries to Mike and Ruki.
"With those two unavailable to us for the immediate future, the opportunity to bring in additional players of the quality of Andy and Jamie, to supplement what we already have here, was a great opportunity.
"Andy is a known quantity and will bring a huge amount of experience while Jamie has been impressing a lot of people over in New Zealand and has the opportunity to do the same here at Kingston Park."