Dana's fake ID is Katherine Wilson. However, Billy refers to her as Katherine Jarvis when Dana comes out of the jail.
As Billy leaves the Mayor's office his shoes are clean, as
he exits the door his shoes are now dirty.
Billy leaves the gun next to the door, but in the next shot the gun is next to him.
Jim: All right. There will be a confrontation, there's no way to avoid it. what we have to do is control the violence so that we're the only ones in danger.
Willy does not appear in this episode.