After three years plying his trade in France, Ma'a Nonu will play for the Blues for a third time after signing a 12-month deal.
After losing to Australia last time out, South Africa boss Rassie Erasmus has decided to make a change at fly-half for Saturday.
Australia are set to welcome back Israel Folau, but the star was named on the right wing.
New Zealand withdrew Sonny Bill Williams from their squad to face South Africa in the Rugby Championship.
Wing Marika Koroibete re-signed with Rugby Australia and the Rebels.
Beauden Barrett and Rieko Ioane are among the players back in the All Blacks fold for their Rugby Championship clash with South Africa.
Adam Ashley-Cooper could add to his 116 Australia caps if he proves himself in Super Rugby, says Wallabies coach Michael Cheika.
Wallabies lock Izack Rodda extended his stay with the Reds, signing a new contract.
Japan will host the 2019 World Cup, which could be the last time 20 nations contest the rugby showpiece.
Having retired following last season, Frederic Michalak is back at Lyon as an advisor to president Yann Roubert and manager Pierre Mignoni.
Mathieu Bastareaud was sent off but Toulon fought back to claim their first Top 14 victory of the campaign.
Worcester Warriors were unable to complete a comeback from 18-0 down at Sale Sharks as they remain winless in the Premiership.
He has not fought since January 2015 but Sonny Bill Williams plans to return to the boxing ring in December, with Steve Hansen's blessing.
All Blacks duo Brodie Retallick and Ngani Laumape will both be sidelined due to injury.
Clermont won an early top-of-the-table clash with Stade Francais, while there were also Top 14 victories for Racing 92, Toulouse and Lyon.
Pro14 champions Leinster were defeated by last season's runners-up Scarlets in a tense clash on Saturday.