What is your boss really capable of? Every employee has asked that question (be it jokingly or with serious intent) at some point, but two interns are about to experience the worst in “The Portable Door.” The adaptation of Tom Holt’s seven-book fantasy series focuses on Paul and Sophie — interns who soon come to realize prominent figures at their firm are disrupting magic. The project hails from “Lambs of God” and “Ali’s Wedding” director Jeffrey Walker with a script by Leon Ford, and there’s definitely a “Harry Potter”-esque vibe to it.