A loose puck came to St. Louis, the Rangers' inspirational postseason leader, alone in the right circle and he fired a snap shot over goalie Dustin Tokarski's shoulder.
"I just got open," said St. Louis, who has 39 career playoff goals. "I tried to trust my instincts. I hit some good shots, he made some good saves. I was fortunate this one got by him."
The Rangers, who lead the series, 3-1, were forced to overtime for the second straight game despite holding a pair of one-goal leads. New York lost Game 3 at home.
Carl Hagelin put the Rangers in front with a short-handed goal in the first period, and
Henrik Lundqvist made 27 saves and earned his 41st postseason win, tying the franchise record of Mike Richter, who was in attendance.
St. Louis and Hagelin both have a team-high six playoff goals.
The Rangers are 6-1 since the unexpected death of St. Louis' mother galvanized the team.
Francis Bouillon tied it for Montreal in the second, and fellow defenseman
New York can advance to the Final with a win at Montreal in Game 5 on Tuesday night. The Rangers, who rallied from a 3-1 deficit against Pittsburgh in the second round, won the first two games of this series there.
Now they hope to end it quickly north of the border.
"We've got to close it," St. Louis said.
Though there were 13 minor penalties, there was no carry-over of the nastiness in Game 3 when a hit by Montreal's