Hey, you know how it is. One minute you’re walking down a London street, minding your own business, when you accidentally step into a police call box and all of a sudden you’re inside the TARDIS and the Doctor has enlisted your help fighting aliens. I hate when that happens.
INT. SCIENCE CLASSROOM - NIGHT
Oz is examining the arrow amidst science paraphernalia. (Swabbing blood off the tip and putting it on a slide. That sounds real sciencey! Did I mention I was an English major?)