Josh Currie kept the P.E.I. Rocket in the game but Alex Micallef delivered the knockout punch in a Quebec Major Junior Hockey League slugfest.
Currie had a hat trick and Micallef scored in overtime for P.E.I., which edged the Acadie-Bathurst Titan 6-5 on Wednesday.
Jack Nevins and Ben Duffy also scored for P.E.I. (25-17-2) in a back-and-forth game.
Michael Beaudry scored twice and had three assists for Acadie-Bathurst (18-22-6), while Marc-Olivier Brouillard, Patrick Walsh and Christophe Lalancette added singles.
Elsewhere, Moncton hammered Saint John 7-1.
At Bathurst, N.B., Currie scored just 37 seconds into the game and his second goal gave the Rocket a 3-1 lead entering the second.
Currie scored a short-handed goal to cap his hat trick in the second, but the Titan tied the game at four with three goals in the period.
Duffy put P.E.I. back ahead 1:54 into the third, but Beaudry sent the game to overtime at 12:34.
Rocket goaltender Antoine Bibeau made 33 saves, while at the other end Jacob Brennan allowed three goals on eight shots. He was replaced by Mason McDonald, who gave up three goals on 40 shots.
Wildcats 7, Sea Dogs 1
At Moncton, N.B., Ivan Barbashev and Dmitrij Jaskin each scored twice for the Wildcats (26-16-1) who mauled Saint John (18-25-0).