PHILADELPHIA -- The Montreal Canadiens are doing an excellent job of keeping fans interested right until the final whistle.
Parenteau came down the middle and beat Flyers goalie Ray Emery to cap the Canadiens' rally from a 3-0 deficit.
Montreal is 3-0-0, its best start since 2005-06.
But it didn't come easy; the Canadiens rallied in the third period for the third straight game. They've outscored their opponents 6-1 in their first three third periods, but have been outscored 6-2 in the six other regulation periods they have played.
"The game plan is to win," said Galchenyuk, who scored the tying goal with 5:20 left in the third. "We just have to keep doing it. It was a really frustrating game until the third. At the end of the day we got the win and that's the most important thing."
Wayne Simmonds had his second-straight two-goal game for the Flyers, and Michael Raffl also had a goal to help Philadelphia build a 3-0 lead. The Canadiens took their game to another level in the third period, scoring three times and outshooting the Flyers 19-4.
"When they got the first goal, we stopped playing," Flyers coach Craig Berube said. "We started watching."
The Canadiens got goals from Markov and Plekanec in a 2:07 span midway through the period, and Montreal players said they could feel the momentum swing their way.
"You're never out of a hockey game," Price said. "How we established that was get the first one and chip away at it. We just found a way to do it."
Markov scored the first one on a floater through traffic at 7:05, and then Plekanec pounced on a Parenteau shot that fell out of Emery's glove next to the net at 9:12.
"We knew we had  minutes left after it was 3-2," Galchenyuk said. "That's lots of time."
The Canadiens tied the game on a play by Plekanec that was similar to the one on which he scored his game-winning goal against the Toronto Maple Leafs on Wednesday. Taking a pass from Markov on the right side, Plekanec threw the puck into traffic near the net, and Galchenyuk, camped in front of Flyers goalie Ray Emery, tipped it in for his first of the season.
"When I get that pass like that and I see the [defenseman] tighter to me, I try to go across the crease for skates, that kind of play, same as I did in Toronto," Plekanec said. "That's the play if you can put the puck at the net."
Although it's not the ideal way to win, Canadiens coach Michel Therrien said the victory Saturday showed the resiliency of his team.
"We showed a lot of character," he said. "This is a group of guys that's got character, and they never give up. They certainly deserved to win the way they played in the third period."
The Flyers (0-2-1) thought they had a chance for their first win of the season the way they played the first two periods.
Raffl's goal 3:39 into the game gave the Flyers their first lead of the season, and Simmonds made it 2-0 just 18 seconds later. Simmonds' second of the game at 55 seconds of the second period made it 3-0.
It's the second time in Simmonds' career he's had back-to-back multigoal games, following a three-game stretch of two-goal games Dec. 21-28, 2013.
As well as the Flyers played in the first two periods, they completely unraveled in the third.
"First goal, you're thinking, 'OK, it's one goal,'" Simmonds said. "Second goal, you get angry. I think as a team that's when you've got to start getting mad. Even after the first goal, you start there and you stop it right away, [but] we continued to turn the puck over and that didn't help us any."
The Flyers survived the onslaught to get the game to overtime and had a chance to win when Canadiens center Lars Eller was called for tripping at 2:23, but they managed only one shot on the power play.
"A positive is we got a point against a tough team," Emery said. "But there's no excuse for games like that, and you just have to learn from it not let it happen again going forward."
The Canadiens also are focused on being better. Although they're happy they've shown the resiliency to keep coming back in the third period, it's a well they know can run dry.
"It's not something you want to do every night," Price said. "You don't want to make that a habit. I definitely think we want to get off on the right foot, get a better start. Playing catch-up is rolling the dice every night. We definitely want to work on our starts."
Although Canadiens fans are certainly having fun knowing their team has been in every game until the final whistle, the players know a way to make the games even more entertaining.
"If we play 60 minutes, we'll be even more fun," Plekanec said.
Follow Adam Kimelman on Twitter: @NHLAdamK