It might behoove some of the Bruins to watch video of the way the fourth line played Thursday night. Though some individual players were good, others were just average or slightly below that mark. The only unit that could really brag after the game was the Merlot Line, which dominated while it was on the ice and even added a goal in the Bruins' 4-1 victory over the Florida Panthers at TD Garden. “I think that line has been pretty good lately,” said Claude Julien. “They’re giving us some good games, they’re scoring some timely goals. They’re a line that deserves a lot of credit . . . "When your team goes through those kinds of [struggles] sometimes, it’s important for lines like that to pick up the slack. That’s what they’re doing right now.” Shawn Thornton, Daniel Paille and Gregory Campbell's night was about effort, relentless pursuit of the puck, and continuing to skate until the bounces come your way. It happened for Thornton in the third period, with the B's holding a slim 2-1 lead. Paille dropped a no-look pass to Thornton as he was rushing in off the right wing, and the Bruins enforcer slid the puck harmlessly through the crease. A forward on a line that’s scuffling might have simply given up at that point as a play that wasn’t going to develop, but Thornton sped around the back of the net and the puck bounced off defenseman Colby Robak right back to him. So Thornton quickly swatted the puck past Florida goalie Scott Clemmensen, pretty much icing the game for the Bruins.