BOSTON, May 14 (UPI) -- Simon Gagne scored with 7:08 to play Friday, completing a historic comeback that put Philadelphia in the conference finals with a 4-3 win over Boston.
The Flyers trailed in the Eastern Conference semifinals 3-0 and also trailed 3-0 in Friday's Game 7, but they rallied to stun the Bruins.
Philadelphia became just the third team in the history of the NHL to win a seven-game series after losing the first three contests. The Flyers will host the equally surprising Montreal Canadiens on Sunday in the first game of the conference finals. The Western Conference finals will also begin on Sunday with Chicago visiting San Jose.
Michael Ryder tallied for Boston 5:27 into the game and Milan Lucic produced two goals in the span of 5 minutes to bring the Bruins a 3-0 advantage.
James van Riemsdyk then gave Philadelphia hope with his first goal of the playoffs, coming with 2:48 left in the opening stanza. The Flyers dominated from that point, tying the contest on second-period goals from Scott Hartnell and Danny Briere.
With 8:50 left in the third, Boston was called for too many men on the ice and Philadelphia went on the power play.
That power play was about to expire when an attempt by Philadelphia's Mike Richards bounced off a skate in front of the goal and came right to Gagne, who from 10 feet away snapped a shot past goaltender Tuukka Rask.
Michael Leighton, called into action late in the series because of an injury to Brian Boucher, made 22 saves to get the victory.
The only other teams to come back from a 3-0 deficit to win a playoff series were the 1942 Toronto Maple Leafs and the 1975 New York Islanders.
This was the fourth Game 7 in this year's NHL playoffs and the visiting team has won all four.
