From Melissa Girimonte of The Televixen:

Link: The Mary Kills People EPs on what shaped the final season
“Ben is in a different state of mind after what he went through, and is at a different point in his life. As much as we were able to strip Mary down to who she is with Ben, the reverse is also true. He’s stripped of being a cop, so he meets Mary again on very raw terms.” Continue reading.