Andrew Mangiapane's late goal propelled the Washington Capitals to a 5-2 victory over the Montreal Canadiens, taking a 3-1 series lead. After trailing 2-1 entering the third period, the Capitals rallied with three goals, including a pair from Brandon Duhaime, who added an empty-netter. Dylan Strome also contributed with a goal and an assist. Logan Thompson was injured during the game, leading to Jakub Dobes stepping in to make 21 saves in his playoff debut. Montreal's Cole Caufield and Juraj Slafkovsky scored, but the Capitals’ defensive effort and timely goals sealed the game. The teams now head to Washington for Game 5.