Hanrahan's return spoiled by leaders Naas
Munster's JJ Hanrahan made his first return from a shoulder injury since resigning from Northampton, but that's where the good news ended for the UL Bohemians out-half, as his side were ousted by Naas at Forenaughts.
Indeed, the Kildare men moved two points clear at the top of Division 1B after running in four tries past Bohs, with player-coach Johne Murphy (13 points) and Fionn Higgins, who scored his third try of the campaign, steering Naas to a 28-13 victory.
Skerries teenager Ciaran Frawley converted four of UCD's five tries and kicked a penalty as they dished out a 36-8 derby defeat to Dublin University, moving to the top of Ulster Bank League Division 1A in the process.
Keelan McKenna, Jamie Glynn, Ronan Foley and Tim Carroll also touched down for the hosts at the Belfield Bowl.
Flanker Niall Lalor bagged a brace of tries as second-placed Terenure College claimed the scalp of defending champions Cork Constitution in a 10-try thriller at Lakelands. The Dubliners giving a league debut to Joe Schmidt's son Tim, the 21-year-old scrum-half who played for Toulouse Espoirs last season.
Hanrahan's provincial colleague, hooker Duncan Casey, also returned from injury with a solid 40 minutes in Shannon's 18-3 success against Old Belvedere on Thomond Park's main pitch.
Second-row Dean Moore, a recent signing from Auch, and Munster hooker Mike Sherry accounted for two of Garryowen's four tries in their 29-17 bonus-point dismissal of Buccaneers, while Lansdowne's back-three of Daniel McEvoy, Mark O'Keefe and Eamonn Mills all crossed in the second-half of their 25-5 victory over Young Munster on the Aviva Stadium's main pitch.
Ulster's Johnny McPhillips was back with a bang for Ballynahinch, scoring 12 points on his return from injury in taking a 27-6 verdict against Old Wesley
Flanker Kevin Allen starred as Dolphin edged out Ballymena 10-6, while recently retired Munster centre Cian Bohane weighed in with a hat-trick of tries as UCC incredibly came from 21 points down to draw 31-31 with Banbridge at Rifle Park.