Who you gonna call…if Sigourney Weaver says no to reprising her role as Dana Barrett, cellist-next-door and vessel-for-demons in a planned third installment of Ghostbusters? According to the MTV movies blog, the rest of the original cast have already signed up; moviegoers will once again be subjected to Bill Murray ecto-plasming his masculine wiles over some poor dame who may or may not turn out to be Weaver. Given that he and his partners in slime have aged some 20-odd years since they first crossed streams, actor, writer and paranormal expert Dan Aykroyd has said that the cast will also include some fresher faces. He’s tight-lipped as to who those actors will be, although come to think of it, Zac Efron—or one of the many Efronites out there—would be about the right age to play Barrett’s now-grown tot, Oscar. Damn, we feel old.