Cashmere Wright's bucket with just over seven 70, in Big East quarterfinal action.
Yancy Gates led all scorers with 23 points for the Bearcats (23-9), who advance to face top-seeded Syracuse in a Friday semifinal. Dion Dixon totaled 13 points and eight boards, Sean Kilpatrick had 12 points and Wright added 10 with four assists.
Henry Sims' basket sent the game to a second OT, two of his 22 points for the Hoyas (23-8), who topped Pitt on Wednesday to open their tourney slate.
Otto Porter's shot helped Georgetown play beyond regulation, and he finished with 14 points and seven boards. Jason Clark contributed 12 points in a valiant, but losing cause.