Game 1 of the series went to Pittsburgh 4-3 at home, but the Flyers countered with a 4-2 win in Game 2 on the road. The Penguins returned the favor, taking Game 3 in Philadelphia after 12 minutes of overtime by a score of 4-3. The Flyers responded with a 4-1 win in Game 4 to even the series as the teams headed back to Pittsburgh for Game 5 on this date in 1989.
Tom Barrasso got the start in goal for the Penguins while Ron Hextall was the starter for Philadelphia.
Lemieux opened the scoring with his 7th goal of the playoffs at 2:15 with assists from Paul Coffey and Kevin Stevens at even strength. Just 1:30 later Lemieux would strike again at 3:45 from Bob Errey and Coffey, again at even strength for a 2-0 Penguins lead. Lemieux then completed his natural hat trick in four minutes and 40 seconds at 6:55 on the power play from John Cullen to put the Penguins up 3-0.
Errey made it 4-0 Pittsburgh 7:07 before Philadelphia got on the board to give them a glimmer of hope at 11:45. Lemieux then tied an NHL record when he scored his fourth goal of the first period, again on the power play, at 17:09 from Dan Quinn on a wraparound into an unguarded net after he stole the puck from Flyers goaltender Hextall, sending the home fans into a frenzy. Just 35 seconds later Troy Loney made the score a remarkable 6-1 for the Penguins after just one period.
Despite giving up 6 goals in the first period, Hextall came out to start the second period, which was more of the same, with the teams combining for five more goals. A mere six seconds into the second period, Pelle Eklund converted a power play opportunity into the second Flyers goal, but Stevens countered for the Penguins just 1:37 later from Coffey and Lemieux at even strength.
At 9:07, Brian Propp beat Barrasso, but yet again Pittsburgh responded quickly when Rob Brown lit the lamp to restore the Penguins five goal lead at 10:35 from Lemieux and Zarley Zalapski. Brown then made the score 9-3 at 12:55 from Lemeiux and Coffey. It was Lemeiux's third assist of the period to give him 7 points on the night - so far - and resulted in Hextall mercifully being pulled after giving up his ninth goal of the game, but not before the fiery Flyers netminder was given a 10 minute misconduct penalty. Brian Dobbin of Philadelphia then received a match penalty for attempt to injure Cullen during their fight at 17:03.
The Flyers let the Penguins know they were not going to quit when they scored a shorthanded goal at 48 seconds and then tried to make a game of it by scoring at 10:21, 13:02 on the power play and finally another one 17:23 to close the gap to a worrisome 9-7.
Hoping to pull off the miraculous comeback, Philadelphia pulled goaltender Ken Wregget, but Lemieux sealed the 10-7 victory for Pittsburgh with his fifth goal of the night at 19:23.