Psych-Out: Shawn and Gus give Shai a run for its money with an ear-splitting performance of "If I Ever Fall in Love."

Pineapple Watch: While in the chief's office, Shawn has Officer McNab bring him a pineapple smoothie.

Shawn uses a new nickname for Lassiter in this episode, making a play off his last name and calling him "Lassie".

Corbin Bernsen (Henry) does not make an appearance in this episode aside from the opening flashback.

Gus: What the hell are you doing?
Shawn: Checking baseball scores. My fantasy team is killing me.
Gus: This is the chief's office.
Shawn: No, she runs the league. I'm kidding. She's in a meeting. She won't mind. Plus, we look really important hanging out in here.

Shawn: Gus, have you tried this chair? It's a pregnancy chair. We have to get one for the office immediately. My birthing canal never felt so in line.

Gus: We need to get out of here.
Shawn: She told me to wait.
Gus: For what?
Shawn: Gus, I am not a mind reader.
Gus: No, that's just what you tell everybody.

Shawn: I want you to try this chair.
Gus: I'm not trying that chair, Shawn.
Shawn: I'll sit on the birthing ball. I kid you not. That thing is like a refreshing waterfall cascading down your vertebrae. It might help with your stomach issues.
Gus: Who told you I have stomach issues?
Shawn: Uh, my nose. The vent in the bathroom. Air fresheners all over the place.
Gus: I'm trying a new medication for my lactose intolerance.
Shawn: I believe the problem is physical. And I think it can be cured by, what I am now referring to as, the magic springy bounce-up chair.

Gus: (sees destruction where a wall once was) What happened here?
Shawn: Oh, that? I had a dry-waller come in and take out a wall.
Gus: A wall? This is a rental. What do you think our landlord is gonna say?
Shawn: Gee, I don't know. "Thank you"? Gus, this place was way too cramped!
Gus: My name is on that lease.
Shawn: Don't worry, I'll make sure you get a thank-you note, too.

Gus: You're taking my name off that lease and the door and these Frisbees.
Shawn: Gus, don’t be ridiculous. Look, I'm almost positive this isn't a load- bearing wall. But if you're really concerned, why don’t you go jump up and down in the attic and make sure?

Shawn: We simply trace his last steps, do a little research, ask a few questions, and bingo!
Gus: Stop saying "bingo." You know how I hate that.
Shawn: OK, fine. Yahtzee?

(performing a séance)
Shawn: Eyes of a serpent, ears of a bat, send us a signal from—
Gus: Shawn!
Shawn: (exaggerated) I hear a voice.
Gus: Can I see you outside please?
Shawn: It wants me to come outside.
Gus: Now!
Shawn: I should go.
Gus: Is that my bathrobe?

Gus: What are you doing?
Shawn: What does it look like I’m doing? I'm having a séance.
Gus: You can't have a séance.
Shawn: Gus, there are no rules against having a séance. Anyone can have one. It's like a garage sale or plastic surgery.
Gus: OK, first of all, technically you need to have a permit to have a garage sale. Secondly, you cannot speak to the dead!

(after the window suddenly shatters)
Gus: Did you do that?
Shawn: Why would I ruin our totally cool window?
Gus: For effect. To make me think you contacted an evil ghost.
Shawn: Gus, please. (pauses) Why didn't you float that idea by me sooner? That's genius.

Shawn: (to the women in the other room) Ladies, stay here! We're going after them...or it! (whispers to Gus) Let's get some tacos.

(pretending to search for the spirit of the desk sergeant's grandma)
Shawn: Oh, yes. Yes, I can feel her all right. She's, uh, she's over by the "W"s.
Desk Sergeant: Why?
Shawn: No, "W."

Gus: How much further is this place?
Shawn: Fifty, sixty miles.
Gus: Sixty miles? And you didn't get me a donut?
Shawn: I did get you a donut, and then I ate it.

Gus: (referring to Raylene) There's nothing wrong with her, Shawn.
Shawn: OK, what is this thing you have with women in jeopardy? They have a name for this, you know. It's called the Stockholm Syndrome.
Gus: No, it's not.
Shawn: Florence Nightingale's disease?

(of whom Raylene reminds Gus)
Shawn: Don't say Meredith Baxter Birney.
Gus: It's not M.B.B.
Shawn: This is unhealthy.
Gus: OK, you were in love with her, too.
Shawn: I loved her because she was Mrs. Keaton, and she gave birth to A.P.K.

Gus: I can smell the laundry vent.
Shawn: No, you can't.
Gus: OK. (starts sniffing around)
Shawn: Oh, Gus. Please, with the "super-smeller." You have to stop. (sniffs) Dude, I can smell it, too.
Gus: I told you.
Shawn: Jeans and socks and underwear and a Bounce sheet!

Shawn: You're not Roger. No. No, no, you're David Wilcroft. Aren't you supposed to be dead?
(Gus faints)
Shawn: Gus? Gus?

(after Shawn sits up unexpectedly in the backseat)
Lassiter: What are you doing in here?
Shawn: I thought we could share info. What are we looking at?
Lassiter: Get the hell out of my car!
Shawn: Shouldn't you be wondering how I slid in and lounged for two minutes without you noticing? (to Juliet) You're new and pretty, so it's OK.

Shawn: I think we can cut our losses, put these two back behind bars, if we work together.
Juliet: And how do we do that?
Shawn: Well, first, we dress up as musketeers and make a very special pact.

Gus: This is breaking and entering.
Shawn: No, no, no, only if we break something...and then enter something. Entering is just entering.

Shawn: Perhaps you've read about me in the paper recently.
Barlow: I've been in jail four years.
Shawn: You don't have papers? I thought you guys had TV and yard darts and Mahjong and—
(Gus hits Shawn)

Shanks: I'm telling you, she's a very dangerous lady.
Gus: (shocked) Raylene was the mastermind.
Shawn: Whoo! I already knew that, 'cause I'm a psychic.

(Shawn and Gus run into the mausoleum)
Gus: Raylene, this is not you—
(Raylene turns, holding a gun)
Shawn: Whoa! What? Today is "Gun Day"?

Raylene: You have five seconds. One...
Shawn: Really?
Raylene: Two...
Shawn: The countdown?
Raylene: Three!
Shawn: OK!

Raylene: (to David) Pry it open.
David: With what?
Raylene: (spots a pole) With a stanchion.
Shawn: Huh, apparently, those are called "stanchions," Gus. Were you aware of this?
Gus: Yes, I was.

Gus: How did you figure out that money was in the crypt?
Shawn: I'm bluffing.
Gus: This is not a good time to bluff.
Shawn: I think it's a great time. She was gonna kill us.

(referring to David)
Gus: He does have nice hair.
Shawn: Yeah, that takes a lot of upkeep, though, man.
Gus: Yeah...
Shawn: You gotta worry about split ends...
Gus: Dandruff...
Shawn: Dandruff.
Gus: It's horrible.
Shawn: It's awful.

(Lassiter leads Shawn out of the room and away from Gus, Juliet, and Karen)
Lassiter: You're trying to get me to admit you're psychic.
Shawn: You've already done that.
Lassiter: No, I haven't.
Shawn: You're right. I'm sorry. You didn't actually say it.
Lassiter: Spencer, no matter what you do, I will never, never ever say those words.
Shawn: Which words?
Lassiter: You know which words.
Shawn: No, man, I lost my train of thought. Which words? (puts his hand on Lassiter's head and grabs his nose) Oh... (shouts into the other room) That you think I'm a psychic! (back to Lassiter) Those words?

Shawn: Don't say Meredith Baxter Birney.
Gus: It's not M.B.B.
Shawn: This is unhealthy.
Gus: OK, you were in love with her, too.
Shawn: I loved her because she was Mrs. Keaton and she gave birth to A.P.K.

Meredith Baxter Birney played the mother, Elyse Keaton, on the '80s sitcom Family Ties. A.P.K stands for her son's name, Alex P. Keaton, played by Michael J. Fox.

Gus: She’s a charming woman.
Shawn: A charming woman? Oh, you’re Jane Austen now?

Jane Austen is an author who has penned numerous novels. One of her most notable works is Pride and Prejudice, published in the early 1800s.

Shawn: We're gonna find the Dread Pirate Wilcroft's dirty booty.

"Dread Pirate" is a reference to the Dread Pirate Roberts, a fictional character in the novel and adapted movie The Princess Bride.

We first get evidence about Gus' "super-smeller" in the episode "Spellingg Bee."