A move back indoors saw more of the same for the Bruins, as the Black and Gold remained the best third-period team in the NHL and scored three goals in the final frame to power by the Kings by a 5-2 final in Los Angeles.

The third-period blitz pushed Boston’s third-period scoring differential up to a staggering plus-34 on the season, which is tops on the NHL and gives them a 10-goal edge over the second-place Dallas Stars.

With the win, the Bruins also became the first to hit the 30-win mark this season (and did it in just 38 games), and pushed their point streak to 12 games, with a 9-0-3 record in their last 12 outings.

And in a game that featured three different goal scorers for the Bruins, it was Trent Frederic who played hero for Jim Montgomery’s squad, with a pair of goals in a 34-second stretch in the third period to seal the deal.

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On the board with a beautiful tip-in marker at the 10:36 mark of the third period, Frederic’s goal was a deserved reward for what was perhaps one of his best shifts of the season.

Frederic collected a strong breakout pass from Brandon Carlo at the Boston blue line, and circled back towards the front of the Los Angeles net to sneak behind the LA defense and beat Copley for his eighth goal of the season. That matched a season career-high for the 24-year-old, and it didn’t take long for a new career-high to be established.

Back on the board 34 seconds later, Frederic’s second goal came with a sweet backhand, behind-the-net dish from Foligno, and with the Kings’ Alex Edler caught in no man’s land when it came to defending Frederic.

Now with nine goals on the year, Frederic is currently paced for what would be a 20-goal season, and that’s with absolutely zero power-play time to the St. Louis native’s name.

Oh, and he beat the heck out of Brendan Lemieux, because what would a game against Lemieux be without Frederic dropping the gloves with him?

Long before Frederic’s third-period takeover, the Bruins found themselves down by one through 20 minutes of play after a Phillip Danault tuck through Jeremy Swayman at the 16:04 mark of the first period.

But the Bruins rallied with second-period goals from David Pastrnak and Brad Marchand, scored just 2:21 apart. The Pastrnak goal was a product of too much time and space gifted to the Black and Gold’s top scorer on the part of the Kings, while Marchand absolutely blasted a shot through the Kings’ Pheonix Copley mere seconds into the B’s power play.

Marchand took a whole lot out of frustration out on that puck, too, as it the goal came minutes after an enraged Marchand was his with an unsportsmanlike penalty for his meltdown following a non-call on what was a clear trip.

Boston’s lead wouldn’t last long, however, as a one-time shot from Kings defenseman Sean Durzi brought the sides back even through 40 minutes of action, and in a period that the Kings dominated from a shot standpoint, with a 15-6 edge.

Swayman remained strong in net, and came through with a pair of big-time stops in the third period to keep this contest knotted up at 2-2, with an initial save on Jaret Anderson-Dolan’s partial break through the Boston defense, and then a follow-up save on an Anze Kopitar high-end look between the circles.

Overall, the 24-year-old Swayman finished with stops on 27 of the 29 shots thrown his way, and won the first-ever NHL head-to-head between two Alaskan-born netminders, with Copley also from Alaska.

Officially recalled from Providence on Thursday morning, Chris Wagner sat out as a healthy scratch for the Bruins. Speaking before the game, Bruins head coach Jim Montgomery said that he wanted to give Wagner a day to get used to the timezone difference before throwing Wagner back in action.

Wagner was joined by Jakub Zboril in the Boston press box as the team’s other healthy scratch.

Thursday was also the 29th birthday of Bruins defenseman Matt Grzelcyk. The birthday boy finished Thursday’s contest with one hit, one blocked shot, and one shot in just over 17 minutes of time on ice.

The Bruins get back to work Saturday night against Erik Karlsson and the Sharks.