For everyone that has ever converted a backpack into a proton pack for Halloween (or on any other occasion—we’re not judging!) or had a certain theme song stuck in their head, we’ve got some news: Dan Aykroyd confirms that the script for Ghostbusters III in almost finished. In fact, he had it on hand when he spoke with the Canadian Press recently. “The script is in my truck, so that’ll tell you how close we are,” Aykroyd said during an appearance at an LCBO to promote his vodka line. The only problem: Bill Murray has yet to confirm he’ll participate in the sequel. “I don’t think any of us would do it if Bill said no,” Sigourney Weaver told Collider.com in a recent interview. “Why would we do that? I think the whole point is to get together and have fun,” she said. Aykroyd mimicked Weaver’s sentiments yesterday, telling the Canadian Press that “[Murray] is certainly welcome to walk in the door anytime. We love him. And it’s hard to contemplate doing it without him.” Aykroyd will appear in the film to train a whole new crew and introduce a female ghostbuster into the mix because, unlike a reluctant Murray, he isn’t afraid of no ghost.