Washington took that two-goal lead to the third, but the Canes cut into it almost instantly, breaking Samsonov's shutout spell with a Jordan Staal deflection of a Pesce point shot just 39 seconds into the final frame.
The Canes then proceeded to put a bullet in their foot when Erik Haula was boxed for slashing just 14 seconds after the Staal strike. Washington restored its two-goal cushion on the power play when Eller pulled a favorable carom off the back wall after Alex Ovechkin missed the net. Eller quickly tucked it behind Mrazek to make it a 3-1 game at 2:29.
Just over two minutes later, the Caps expanded their lead on a rush goal. T.J. Oshie left the puck for Kuznetsov on the left wing wall at the Carolina line, and Kuznetsov carried deeper before firing a cross-ice feed to Jakub Vrana at the back door. Vrana slipped a shot behind Mrazek on the short side at 4:51, breaking a 10-game dry spell with his 16th goal of the season.
When the Caps again began parading to the penalty box, the Vrana goal began to loom larger. Eight seconds after Carl Hagelin was hauled off for hooking, Carolina's Teuvo Teravainen scored to make it 4-2 at 6:35.
Oshie was incarcerated for cross-checking in the back half of the third, and again the Canes cashed in, pulling to within a goal on Ryan Dzingel's power-play tally exactly six minutes after Teravainen's.
The Canes had all the momentum at that point, and the Caps seemed to be white-knuckling their way through the late minutes of the third, but they got some help when Carolina put a bullet in its other foot. After taking an Oshie hit in the corner of the Carolina zone, Hamilton reached out and issued a gloved punch to the back of the Washington winger's helmet, incurring an unwise roughing minor with 2:44 left.
Hamilton's unforced error enabled the Caps to run out the clock and head back to the District with two points.
"It's a tough game because I really felt that of the last couple of games we played against them, it felt like we were going pretty good," says Canes coach Rod Brind'Amour. "That's a tough loss."
Samsonov ran his record to 11-2-1 on the season, and he maintained his perfect road mark at 8-0-0, just the second goaltender in league history to win each of the first eight road starts of his NHL career. He faced the most shots (41) he has faced thus far in his young career.
"It's okay, I like it," says Samsonov of the heavy shot volume. "I like it with the shots at my net. It's a hard game, hard win. It's good for the team, the team stayed all together, a lot of [penalty killing]. It's a hard game."