Monday's Riddle! A Stolen Glance...

Good morning Riddlers! Here's this week's puzzle. Can you guess the theme? Marcus is our go-to man when the DMS needs one of these ; ) ~ F
I want to know what you do. I patiently watch and wait for a clue. Beware of me, for I can be clever- I'll tell what I've found to thwart the endeavor. Behind a newspaper or perched in a tree, maybe sitting in a cafe drinking some tea. My interest is keen when I study my charge, using my gadgets if you're at large. It's always an adventure when I track my case. My identity is masked, but perhaps not my face.

What am I? 
I gave you a clue!
The answer is happening in this picture  
FEAR NOT THE UNEXPECTED