This kind of episode is what I meant when I was ranting about the need for some outside characters who actually knew Lydia and Paul before Jacob died to show up and flesh out some details. “Full Disclosure,” in which we watch Paul spending time with his nephew Nate as they try to track down Mikey’s whereabouts — or rather, Nate tries to track down Mikey, and Paul tries to throw him off the scent — really fills out Paul’s character and winds up being a real showcase for Romano.