Zach Hyman likewise scored for the Maple Leafs. William Nylander included two assists and Jack Campbell stopped 26 shots for Toronto.
Jesperi Kotkaniemi likewise scored for the Canadiens, while Carey Price made 32 saves.
Armia scored at 5:13 of the very first from the slot after a Maple Leafs turnover triggered by Corey Perrys hit on Rasmus Sandin.
When he moved the puck under Campbell on Montreals 3rd effort during a scramble in front of the net, Armia scored once again at 8:18.
Nick Suzuki scored 59 seconds into overtime and the going to Montreal Canadiens defeated the Toronto Maple Leafs 4-3 Thursday night to fend off elimination in the first-round, best-of-seven playoff series.
The Maple Leafs lead the series 3-2 with Game 6 to be played Saturday at Montreal.
Suzuki completed a give-and-go with novice Cole Caufield after a Toronto turnover in the neutral zone offered the Canadiens a two-man breakaway.
Joel Armia scored two times in the very first duration for the Canadiens, who increased the lead to 3-0 early in the second period.
Jake Muzzin scored two times for Toronto in the third duration to connect the video game.
When Kotkaniemi took benefit of Sandins turnover after a Montreal dump in, the Canadiens took a 3-0 lead at 4:52 of the second duration. Kotkaniemi took the puck from the side of the net to the low slot and stuffed it previous Campbell from the edge of the crease.
Hyman nudged the puck home from a scramble in front of the Montreal internet at 6:32 of the second to cut the cause 3-1. Auston Matthews won a faceoff in the Montreal zone and Mitchell Marner shot the puck at the goal.
After the Canadiens had exterminated a penalty, Muzzin threaded a point shot from the blue line through a cluster of players at 6:52 of the third.
Muzzin connected the game at 11:54 of the 3rd. He dropped a pass to Alex Galchenyuk, who shot from the left circle. Muzzin continued driving to the objective and deflected the shot previous Price.
— Field Level Media
Muzzin connected the video game at 11:54 of the 3rd. He dropped a pass to Alex Galchenyuk, who shot from the left circle. Muzzin continued driving to the objective and deflected the shot previous Price.