The very first time we meet Paul Robertson in “A Good Man,” it’s at the funeral of Will Brown. It’s a poignant framing device that immediately tells us how pivotal this man will be in Paul’s life.

“He loved you,” Will’s wife Amy tells Paul. “You were the son he never had.”

And Paul’s own thoughts confirm the depth of their connection: “Amy knew that Will had been like a father to me since I lost my real fat...