After being a healthy scratch Thursday in a Game 3 loss to the Anaheim Ducks, Vermette scored the game-winning goal 5:37 into double overtime for a 5-4 win that evened the best-of-7 series at 2-2.
Game 5 is at Honda Center on Monday (9 p.m.; NBCSN; CBC; TVA Sports).
Left wing Patrick Sharp sent a pass from behind the Ducks net to Vermette, whose shot from the slot was blocked by Ducks forward Rickard Rakell. Vermette pounced on the loose puck and sent it into the net past goalie Frederik Andersen.
Vermette slid to the corner, pumped his fists and celebrated his second goal of the 2015 Stanley Cup Playoffs, also his second since coming to Chicago prior to the NHL Trade Deadline. He didn't score in 19 regular-season games with the Blackhawks after leaving the Arizona Coyotes.
"I think overall on that shift, we talk about our speed, and I think we are effective when we move our feet," Vermette said. "I think that was an illustration of that. We get the puck going in their end a little bit. We stuck with it. ... Lucky enough we got it back and put it in."