Tuch pulled the Golden Knights to within 2-1 at 1:03 of the third period, driving to the net to bat Nicolas Roy's pass after a turnover by Avalanche forward Andre Burakovsky.
"That was very lucky," Tuch said. "[Roy] and [Mattias Janmark] made a really good play on the forecheck, I tried to provide some pressure, and they ended up stripping the guy. I saw them get possession, and I tried to break toward the net. [Roy] put it on a platter, and I was able to bat that into the net."
Marchessault tied it 2-2 at 4:07, flipping the puck over Grubauer's left pad from in front after a pass from William Karlsson, who gained possession when a pass by Landeskog caromed off Graves' skate.
"We don't have much time to do anything but rebound, forget about this one, and move on," Landeskog said. "We've got to go into Vegas and win a hockey game. It's as simple as that."
NOTES: Teams that win Game 5 in a series that was tied 2-2 are 215-58 (.788) winning a best-of-7 Stanley Cup Playoff series. … It was Stone's first NHL playoff overtime goal. ... Janmark was plus-1 with an assist and two hits in 14:45 in his first game since sustaining an upper-body injury on a hit by Graves in Game 1. ... Marchessault has five goals and two assists during a five-game point streak. … Colorado had won 13 straight home games, four in the playoffs, and was 20-0-1 in its previous 21 at home. … Saad has scored seven goals in the past eight games. … Avalanche forward Logan O'Connor was minus-1 with three shots on goal and seven hits in 13:18 in his NHL playoff debut, his first game since sustaining a lower-body injury March 31. … Avalanche forward Nazem Kadri's appeal of his eight-game suspension from the NHL Department of Player Safety was denied in a binding ruling by an independent arbitrator. He served his seventh game Tuesday and will complete it Thursday.