PITTSBURGH — Sean Couturier beat Matt Murray with 3 seconds remaining in overtime and the Philadelphia Flyers put together an improbable rally to edge the Pittsburgh Penguins 2-1 on Sunday night.

James van Riemsdyk tied the score with 18 seconds left in regulation when Murray’s glove couldn’t quite reach van Riemsdyk’s wrist shot from the slot. The team traded a flurry of quality chances in the extra period before Couturier danced around Pittsburgh star Sidney Crosby on the rush then sent a shot over Murray’s stick to give Philadelphia’s fading playoff hopes a needed jolt.

Carter Hart finished with 41 saves for his first victory since Feb. 17 as the Flyers put together a comeback that echoed their stunning rally in their stadium series meeting with the Penguins last month. Philadelphia scored twice in the final 3:04 of regulation before winning it in overtime.

Teddy Blueger, starting on the second line in place of injured Evgeni Malkin, scored Pittsburgh’s lone goal as the Penguins managed just one point out of a pair of home games during the weekend.

Murray, who was pulled after allowing four goals on 13 shots in a loss to St. Louis in Saturday, bounced back by stopping 36 shots but couldn’t get a handle on Couturier’s winner.

The Flyers appeared to take the lead 1:06 into the second period when Claude Giroux’s wrist shot from the right circle beat Murray. The on-ice officials, however, immediately waved it off, ruling Jakub Voracek interfered with Murray as he skated by the crease as the shot closed in. The Flyers challenged the call, and it was overturned by league officials in Toronto. Pittsburgh then challenged that ruling, claiming Philadelphia was offsides when it entered the zone. The call was then overturned a second time, leaving the game scoreless.

Got it?

Goal or no goal, it was one of the few times the Flyers truly tested Murray. The Penguins tilted the ice heavily at times, swarming Hart with extended pressure. Finishing, however, was another matter. If Pittsburgh wasn’t shooting wide — as Nick Bjugstad did on a breakaway in the second period — then the 20-year-old Hart was making an indelible first impression in one of the NHL’s most testy rivalries. He made a gorgeous stop on Patric Hornqvist in the second, extending his left pad to stop a point-blank shot from Hornqvist in the slot.

Hart had no chance, though, on Blueger’s fourth career goal.