Towards a unified theory of Mark Sheppard

I'm beginning to realize that Mark Sheppard really is everywhere. The Chiller network has been running ads for an X-Files run they're going to start soon and there's a clip of him on it. Firefly (which is when I remember first really noticing him), BSG, Warehouse 13, Chuck, Leverage, Burn Notice, The Invisible Man, Special Unit 2, Jake 2.0 and the list goes on.

So if God is everywhere, maybe Mark Sheppard is God.