Rob Reiner usually stays away from making sequels, but when it came to This Is Spinal Tap, he couldn’t say Never for Ever.

The director is getting the band back together for one last show, a follow-up to the beloved rock mockumentary, 41 years after it was released in 1984. The whole hair-metal outfit, including Christopher Guest, Harry Shearer, and Michael McKean, is returning for the sequel, which also marks the first time the band has played together in 15 years.

So, what took so long? And what made Reiner, who’s spoken about his dislike of sequels for years, finally change his mind? Part of the decision, it turns out, had to do with Kate Bush’s recent resurgence in popularity thanks to a needle drop in Netflix’s Stranger Things.

“We remembered that Kate Bush had had a song put up on Stranger Things,” the director recently told Entertainment Weekly. “And all of a sudden, there’s this resurgence for Kate Bush. We thought, ‘Ah, that’s what it is.'”

The renewed interest in Bush’s music gave Reiner an idea for how Spinal Tap might get back together after years of not playing together. “We got to get some rockstar to sing one of their songs, like joking around at a soundcheck and somebody captures it on iPhone, puts it up on, puts it up on TikTok, it goes viral, and all of a sudden, ‘Hey, Spinal Tap. So that became the basis of what we did.”

While Bush and Stranger Things provided an inroad to the story, Reiner says his choice to revisit the material also had to do with finances.

“Over the years, people kept saying, ‘You should do a sequel. Do a sequel.’ And we said, ‘No, we’ve done it. We’ve done it. This should sit by itself,'” he explains.