Markstrom made a save in the slot against Ondrej Palat at 12:31 after Palat took a pass from the corner from Nikita Kucherov.
"It's a common thing now after every game, he's keeping us in games and helping us win games and especially when you play against a team like that, it's hard to win games when you don't have a good goaltender and he's been outstanding for us," Gaudreau said.
Killorn tied it 1-1 at 15:40 when he deflected Ross Colton's centering pass.
"We know what we have to do," Stamkos said. "These are little adverse moments throughout a season. It's nothing to panic about. Lots of times throughout the course of seasons, even the seasons we've won, things like this have happened. It's about learning from the mistakes you make in the games and just executing better."
NOTES:Calgary is 13-1-1 in its past 15 home games. … It was Gaudreau's first hat trick since March 12, 2019. ... The Flames are 28-0-2 when leading after two periods. ... Lindholm has scored 12 points (six goals, six assists) in a seven-game point streak. … Gudbranson, 30, established an NHL career high with his 14th point (five goals, nine assists) on Backlund's goal. ... Colton has one goal and three assists during a four-game point streak.