They're calling these events The Pattern, as if someone out there is experimenting, only the whole world is a lab.

Broyles - "Dr. Bishop, any thoughts?"
Walter - "Perhaps, first I need a piece of special equipment, my turntable."
Broyles - 'Is that some kind of lab equipment?"
Walter -... more

Olivia: "I just want to go back to before."
Broyles: "I don't think you can."

Broyles: "Are you serious?"
Peter: "That is the first serious thing I've said all day!"

This can't possibly be scientific.

Philip Broyles: "When the threat is unimaginable that is when we are at the door. And you should thank God for that."

Why are shapeshifters from another universe stealing heads?