The visitors had barely settled into the match when the Parisiens struck just eight minutes in when Pablo Sarabia whipped a superb first-time strike up and over the keeper from outside the box.
Kylian Mbappe, Angel Di Maria, and Layvin Kurzawa would each grab a goal, too, while PSG also benefitted from an own goal from Daniel Congre.
However, the real star of the show was Neymar, who recorded an assist but quite simply ran things creativity, breaking in from the left wing. As the scoreline grew, so did his confidence (not that he lacked any), as he eventually pulled off a rainbow flick on a Montpellier defender, resulting in a telling off from the referee for allegedly showing disrespect.
Although not completely infallible at the back, they kept Montpellier down to just two shots on target.
As usual, they outpassed their opponents significantly, with 597 to 284.
Brentford bounced back from a draw against Huddersfield and defeat against Nottingham Forest with a comprehensive 5-1 win away at Hull which put them within five points of second.
Said Benrahma was the man of the match, scoring a superb hat-trick. He earned it with a curled effort from the edge of the box which nestled into the bottom corner, an emphatic finish from inside the box, and then a composed strike into the roof of the net after the ball broke kindly to him at the back post.
The Bees were simply relentless going forward as they fired 25 shots on goal in total, while Hull were mesmerised by the 550 completed passes and 751 touches from the visitors, too.
Defensively, they conceded just one shot on target. However, they did concede in comical circumstances after David Raya allowed a pass to bounce under his foot into the back of the net.
Dortmund have been in incredible form since the turn of the year, winning three games out of three and scoring 15 goals in that time.
At the weekend, they defeated Union Berlin 5-0 and also had two record breakers in their ranks.
Jadon Sancho became the first teenager to score 25 goals in the Bundesliga, while Erling Haaland also made history by becoming the first player to score seven goals in his opening three Bundesliga games.
The Englishman got one while Haaland scored two, with Marco Reus and Axel Witsel also getting on the scoresheet.
BVB have looked a completely different animal since the acquisition of the former RB Salzburg hitman, as they finally have a number nine capable of finishing the many, many chances which were going to waste previously.
Here, they barely let Union Berlin breathe, wit 902 touches of the ball ensuring the visitors had to be at attention at all times.