Leading the series 2-1, the Saginaw Spirit had a chance to put a strangle hold on the London Knights in game four at the Dow Event Center Wednesday.
But the Knights took a commanding 4-goal lead after the first period and the Spirit never could recover.
Jake Paterson was pulled after allowing three goals; Clint Windsor replaced him.
Vincent Trocheck scored the Spirit's only two goals in the second period as Saginaw falls 5-2.
Now, it's a best-of-three series, as game five heads back London on Friday night.
Game six will be at the Dow Event Center at 7:11 PM.