"I'll meet you there, my dear.  And don't worry, I'll bring proof that I am who I say I am."<br/><br/>He hung up the phone, and got right to work.  Magic is a tricky thing, especially to a rational scientist like The Spoiler.  One could never be too careful, after all.  So The Spoiler set to work building a small harmonic field generator, sufficient to block magical power from penetrating the field.  Of course, building one that small had two drawbacks: it would have limited range and limited battery life.  The lifespan of the the field wasn't an issue, as he only required it to last through the interview.  The small size of the field was a greater issue; his primary goal was to protect the sanctity of his mind, however, so placing the device in the collar of his coat would prove sufficient.<br/><br/>Naturally this sort of thing would take time to invent, but then, The Spoiler had infinite time.  He needed only to travel back in time after completing the device, such that he arrives at the Herald rooftop at 4:30.<br/><br/>So he did.  And he did.  And he also did all the other things, such that he arrived at the Herald rooftop at 4:30 for the interview, his mind shielded from unwanted intrusion.