A last-minute try by England fly-half Fin Smith saw Northampton Saints snatch a thrilling 35-28 victory over Exeter Chiefs at Sandy Park on Saturday afternoon.
A late penalty from Henry Slade saw Exeter edge out Benetton 44-41 and set up a Challenge Cup semi-final against Ulster
Exeter scored five first-half tries to claim a 38-14 Gallagher Prem win over Newcastle at Kingston Park.
Northampton returned to the top of the Gallagher Prem table despite a disjointed display in a narrow 28-27 victory over battling bottom side Newcastle.
Bath lost a 26-point lead in an epic south-west derby only to snatch back victory in the most dramatic fashion in the closing seconds to beat Exeter 33-26, before Northampton Saints returned to the top of the Prem table.
Greg Fisilau inspired a resurgent Exeter to a 24-10 Gallagher Premiership win over Leicester Tigers, moving them within a point of league leaders Northampton Saints.
Henry Slade's last-gasp try ignited wild celebrations as Exeter registered their first success at StoneX Stadium for eight years with a 30-24 victory over Saracens.
Edinburgh were brought back down to earth in the Investec Champions Cup after a comfortable win last week was disrupted by a 33-0 defeat at Castres on Sunday.