Connor Burk scored 2:33 into overtime, and the Weyburn Red Wings kept their season alive with a 3-2 (OT) win over the top-seeded Melfort Mustangs, which sends the series back to Melfort for a Game 5 on Friday.
The Mustangs still lead the Best-of-Seven Quarter-Final 3-1.
Melfort out-shot Weyburn 38-22, including 15-8 in the third period, but Jack Burgart made 36/38 saves to extend the Wings' season.
Aidan Teilborg scored both regulation goals for the Wings, giving them 1-0 and 2-1 leads. Answering for the Mustangs were David Heath and Travis Mayan.