Sam Steel scored on a breakaway 32 seconds into overtime to ice the contest.
Aaron Hyman got the comeback started with his second of the season and then Jake Leschyshyn tied it at two with his 16th and the Pats went to overtime for the 11th time this season.
In the extra frame, Cameron Hebig sprung Sam Steel on a breakaway and he went backhand to score his 25th, giving the Pats a 3-2 win.
Hebig led the offence with a three assist night while Max Paddock made 23 saves.
Regina outshot Calgary 34-25, the powerplay was 0/2 and the penalty kill went 2/2.
- Aaron Hyman scored his first goal in a Pats uniform in the win.
- Sam Steel extended his point streak to seven games, has four goals and seven assists in that stretch.
- Max Paddock is 4-1-0-0 in his last five starts.
The Pats (34-25-6) continue their road trip Sunday in Edmonton against the Oil Kings. Puck drops at 5 p.m. Regina time on 620 CKRM. Next home game is Wednesday, March 14 against Prince Albert at 7 p.m. at the Brandt Centre. Tickets are available at reginapats.com, the Brandt Centre Box office and at any Regina Safeway where FunZone tickets are just $13 plus tax.
(With files from ReginaPats.com/HitmenHockey.com)