TAMPA — A three-goal lead wasn’t enough for the Bruins Saturday, and once again Simon Gagne made them pay.
The Lightning forward sent a wrist shot past both Tomas Kaberle  and Tim Thomas  at 6:54 of the third period, capping a run of four unanswered goals from Tampa Bay at St. Pete Times Forum. Martin St. Louis added an empty-netter in the final minute to make it a 5-3 Lightning win and even the Eastern Conference finals at two games apiece.
The Bruins jumped out to a 3-0 lead in the first period with a pair of goals from Patrice Bergeron  and one from Michael Ryder  to bring Mike Smith to the Lightning’s net in favor of starter Dwayne Roloson. The B’s saw their lead erased in the second period after two goals from Teddy Purcell and one from Sean Bergenheim.
Bergenheim now has nine goals this postseason after scoring 14 in the regular season.
Both the Bruins and Lightning went 0-for-2 on the power play, though Bergeron’s second goal was of shorthanded variety.
The teams will head to Boston for Game 5 of the series Monday before returning to Tampa for Wednesday’s Game 6.
WHAT WENT WRONG FOR THE BRUINS
– The second period couldn’t have ended soon enough. The Lightning completely took control in the period. It could have been worse when the generally steady Andrew Ference  nearly saw that happen late in the second when he misplayed a puck in front of Thomas’ net.
– Tomas Kaberle deserved credit for his improved play in Games 2 and 3, but he was soft behind the net on Bergenheim’s game-tying hole. Bergenheim had very little difficulty outmuscling the 33-year-old blueliner to gain possession before beating Thomas. This is the second time a lapse from Kaberle behind his own net has led to a goal in this series.
– A poor showing by the Bruins’ first line, and it was capped with the Gagne goal. Milan Lucic’s turnover set up the play, and Lucic was the only member of his line with a shot on goal through the first 50 minutes of the game. The Lucic – David Krejci  – Nathan Horton  trio has been gigantic for the B’s in the postseason many a time, but Saturday was not one of them. Julien played with the lines a bit as the game went on, but it came with no success. Horton redirected a shot from Ference past Smith with 1:50 left while playing on a reconfigured line with Rich Peverley .
WHAT WENT RIGHT FOR THE BRUINS
– If Patrice Bergeron’s return to the Bruins’ lineup on Thursday didn’t make enough noise, he made his importance the B’s known even more with a two first-period goals. The 25-year-old picked Steven Stamkos’ pocket at the blue line with the Lightning on the power play with about two minutes remaining in the first and took it the length of the ice for what would be his second goal of the game and Roloson’ final play. Bergeron now has four goals and 10 assists for 14 points in 13 games this postseason.
– Guy Boucher called Tim Thomas an “enigma” prior to the series, noting that no team could crack the B’s netminder, but in reality, his own goaltender had been even better. Roloson led all playoff goaltenders in goals against average and save percentage through two rounds, but the B’s have now chased Roloson in two of this series’ four games. One would think the B’s would win both of those games, but that’s another story’¦
– Ryder’s been just as big a part of his line’s success as Tyler Seguin  and Chris Kelly  have been, and he was rewarded on an odd goal that clearly fooled Roloson. The third-line winger tried a backhander on Roloson that went off the stick of Mike Lundin on its way up, and with Roloson cheating toward the far post, it beat the Lightning netminder in slow motion. Saturday marked the first time Ryder scored without having a two-goal game, as his first four goals this postseason game when he scored twice in Game 4 of the first round and twice in Game 2 vs. Tampa Bay.