The Calgary Flames are headed to overtime at the Saddledome with the score tied at 3-3, but they nearly tied the game considerably earlier in the third period than they actually did.
The situation room in Toronto judged Sam Bennett's shot on Frederik Andersen at 13:43 of the third period to not conclusively be fully across the goal line.
Per the NHL:
At 13:43 of the third period in the Anaheim Ducks/Calgary Flames game, the Situation Room initiated a video review to further examine Sam Bennett's shot at 13:38.