There is an apparent conflict of interest. As McMillan points out, he "can't be a police commissioner and a naval officer at the same time: it's against the law." But "old friends can still have conversations," therefore his consultations with Sgt. Enright are not a mistake.
Mac: Mildred, are you still here?
Mildred: I haven't finished your milk and cookies yet.
Mac: Why don't you finish them downstairs?
Mildred: What about you guys?
Mac: Sally and I are going to spend a little time doing what most married couples do.
Mildred: Oh, we going to watch television?
Mac: Say good night, Mildred.
Mildred: Good night, Mildred.
Mildred: Here we are, milk and cookies for own William Jennings Bryan.
Mac: William Jennings Bryan lost the biggest case of his career.
Mildred: Well, maybe he could win on appeal.
Cmdr. Campbell: There seems to be some faint chance that your client is innocent.
Sally: Gunshops? What are we going to be looking for in gunshops?
Sally: Bullets? We've got a whole box of them in the dresser drawer.
Mac: Not any more. I ate the last one this morning.
Sally: Mac, for the first time in my life, I'm more tired than I am curious. Just tell me in the morning. Home, James.
Mac: (reading brief on exercise bike) Am I in your way?
Mildred: (stopping him to read over his shoulder) Boy, this is better than a porno movie.
Cmdr. Campbell: Oh, I don't mind police commissioners. It's JAG reserve officers I haven't much time for.
Mac: You have no glamor in your soul, Mildred, not an ounce.
Mildred: We of the broom brigade, Commander Commissioner, take a different view of things.
Mac: The woman has no patriotism.
Sally: None at all.
(Mac is in his naval uniform.)
Sally: Mac, you look beautiful.
Mac: Mm, not bad for an old sea dog.
Mildred: Yes, especially one who's never been to sea.