We take another look round some of the main news surrounding our European Rugby Challenge Cup sides ahead of a busy domestic weekend. Internationals set to return to bolster Connacht Connacht Rugby will welcome back Ireland internationals Bundee Aki and Kieran Marmion when they face Edinburgh Rugby in the Scottish capital on Friday night. Centre Aki will start on the bench with scrum-half Marmion set to make his first start of the season. https://twitter.com/connachtrugby/status/1040200662397734912 Agen signing Agen have turned to a rugby league cup winner in their bid to qualify for the knockout stages of the Challenge Cup for the first time since 2001. Wing Foud Yaha has joined the Pool 5 club from French team Catalans Dragons, whom he helped become the first non-English winners of the Rugby League Challenge Cup last month. The 22-year-old, who has played four rugby league Tests for France, has signed a two-year contract with Agen. https://twitter.com/agen_rugby/status/1040162545309544448 Dragons without Henson and Morgan Welsh region Dragons face a daunting task this weekend as they face a trip to Dublin to do battle against defending Champions Cup winners Leinster Rugby. They will have to make do without fly-half Gavin Henson (knee) and centre Tyler Morgan (hamstring) who have been ruled out through injury. https://twitter.com/dragonsrugby/status/1039531871338721280 Super Bowl candidate? With the NFL season getting underway last week, Grenoble have been giving american football a go in training but from what we can see, Tom Brady doesn’t have too much to worry about! The French side open up their Challenge Cup campaign with a visit to Benetton Rugby on October 13. https://twitter.com/fcgrugby/status/1040502253004705793?s=21 Te’o and Hougaard close to Worcester return Former South Africa scrum-half Francois Hougaard and England outside centre Ben Te’o look to be on the way back from slight injuries, according to Worcester Warriors director of rugby Alan Solomons. They should both be available for the Warriors’ Challenge Cup opener against 2017 winners Stade Francais Paris. https://twitter.com/WorcsWarriors/status/1039904432320925696 Bears bring in back up Bristol Bears currently have full-back Charles Piutau, utility-back Luke Daniels and fly-half Matt Protheroe on the sidelines and as a result have added utility-back Zane Kirchner. The former South Africa international has joined the West Country club on loan on a one-month deal with the 34-year-old able to play full-back, wing or centre. https://twitter.com/BristolBears/status/1040180419608621057