Who you gonna call?

One benefit of our recent office move is that I now share an office space with a number of very smart people, including friend and former roommate bsom, who now has a cube right outside my office. It's good that we can pick each other's brains now, although I'm hoping it's not too distracting.

He hung a whiteboard in his cube with this The Doctor is In/Out message on it. I decided to add a third option.