Jamie: "Why weren't you at that rally?"
Gwen: "I ate bad shrimp or something. Do you have pets? Any reason for you to go away and let me sit this vigil alone for a sec and figure out all my situations?"
Jamie: "I don't have a cat. I don't believe in pets. Maybe if I named it Belko. But no, I just don't like animals. Or people. Or sex."
Gwen: "I wish I was asexual like you."
Jamie: "Who knows if I am even joking."
Gwen: "Hey, apropos of really nothing, did Darren ever cheat on his wife Lily? Perhaps you have heard of her."
Jamie: "Silence is my only response to how many different ways that's not okay for you to talk about right now."
Gwen, crying: "Jeez. But no, this all makes more sense in retrospect."
Linden: "So you don't even know where Gil Sloane is right now?"
Amazing Gay Lady: "Men, I tell ya."
Ex-Husband: "Blah blah taking my son out of state..."
Linden: "...You haven't seen him for ten years, don't blah-blah me..."
Then she sees Gil's picture hanging in the trophy case and recognizes him, so we get our first patented Sarah Linden Hangs Up In The Damn Middle Of A Conversation moment of the season. Just hangs that shit right up. I love when she does that. I like to imagine her in the grocery store with a basket of items and then she's like, "Forgot mayo!" and just drops the basket and wanders off into the aisles to look for mayo and when she gets there she's like, "My car needs a tuneup!" and just wanders out into the parking lot. "I forgot to go to grad school!" "I gotta DVR my shows ... but I totally forgot to have a house where I live!" "I don't like these shoes, I'm takin' 'em off!" And that's why sometimes you see just one shoe, on the side of the road: Sarah Linden wasn't feeling it that day.
This show doesn't really expect you to remember every little thing, does it? I'm going to assume that she saw Gil the day she was stalking Holder on his day off (I think) and went to AA. That's basically what I think the episode is saying here. I mean, Sarah Linden remembers things better than you or me, right? That's part of her overall deal. So I'm not going to question it or do any more homework than the average viewer would be expected to do, but the show seems pretty game to meet you halfway on that.