What this means for the Capitals: With Ovechkin and Holtby leading the way, the Capitals forced a Game 6 and kept alive their hopes of coming back from a 3-1 series hole for the third time in their history. The last time they did it was against the New York Rangers in the first round of the 2009 Stanley Cup Playoffs.
What this means for the Penguins: The Penguins failed in their first try to eliminate the Capitals. They'll get their next chance in Pittsburgh on Tuesday, where they are 4-1 in this year's playoffs.
Key moment:With the score tied 1-1, Cole took a retaliatory slashing penalty against Capitals forward Tom Wilson behind the play 2:54 into the second period. The Capitals cashed in on the resulting power play with Oshie knocking in the rebound off of Ovechkin's one-timer from the left circle at 4:00 to make it 2-1.
Williams scored 5:58 later to give the Capitals their first two-goal lead of the series.
Unsung player of the game: Before Washington's third goal, left wing Jason Chimera pressured Dumoulin in the left circle, causing him to make a poor pass towards the middle of the ice that Williams intercepted in the high slot. Williams then took a wrist shot from between the circles that found an opening between Murray's pads and trickled over the goal line.
What's next: Game 6 is at Consol Energy Center on Tuesday (8 p.m. ET; NBCSN).