Regina evened the Eastern Conference final 2-2 and will host Game 5 on Friday.
Braydon Buziak, Jeff de Wit, Dawson Leedahl and Wyatt Sloboshan also scored for the Pats, who got a 24-save outing from Tyler Brown.
Dylan Cozens and Ryan Vandervlis found the back of the net for the Hurricanes. Stuart Skinner stopped 28-of-33 shots in a losing cause.
Regina went 1 for 4 on the power play while Lethbridge failed to score on two chances with the man advantage.
Game 5 Friday is already soldout. It can be heard on 620 CKRM radio, and viewed on the WHL on Shaw and Access 7.