The Kings surrendered a goal in the final minute of regulation to allow the Blues to tie the game, but they'd have the last laugh as defenseman Slava Voynov beat Brian Elliott for the game winner in overtime.
Ouch, Elliott. That's rough.
This was Voynov's second goal of the series against the Blues. He also scored the game-winning goal in game three for the Kings.
Let's take a look at the questions we were tracking in Wednesday night's contest.
Will home-ice advantage still be a factor?
Not this time, The Kings managed to be the first team to win a road game in this series.
Will Los Angeles continue to improve in the face-off circle?
It wasn't the Kings' night on the dot, as they won only 25 draws compared to 36 for St. Louis.
Will the series resume its defensive tone?
A low-scoring defensive duel just feels right with these two teams. Even with overtime included, the shots were only 36-25, in favor of St. Louis.
The Kings won the game, 3-2, and lead the series, 3-2. They have a chance to eliminate the Blues in Los Angeles on Friday.