Worf and Jadzia's romantic relationship starts at the end of this episode. Sparks also begin to fly between Kira and O'Brien, but they both make a conscious effort to pull back from any inappropriate intimacy.
Bizarrely, Worf says that he has never courted a Klingon female before, even though he fathered a child (Alexander Roshenko) with and attempted to marry a Klingon female (K'Ehleyr) in the Next Generation episodes "Reunion", "The Emissary" and "Sins Of The Father". Then again, K'Ehleyr was only half-Klingon, and preferred to behave mostly in the fashion of her human parent.
Nitpick: Even if Quark had Worf to lead him through the battle moves with Thopok, he still wouldn't have had the physical strength to hold back Thopok's blows.
Nitpick: Can a civilian like Quark really wander completely unescorted on to the Defiant, as he does when he comes to tell Worf about his date?
Worf: The idea of a Ferengi courting a great lady is... offensive.
Quark: You know, it's attitudes like that that keep you people from getting invited to all the really good parties!
Worf: You are not in my shoes.
Jadzia: That's too bad. You'd be amazed what I can do in a pair of size eighteen boots.
Thopok: Where did you learn to fight with a bat'leth?!
Quark: I'm a man of many talents!
Bashir: A compound fracture of the right radius, two fractured ribs, torn ligaments, strained tendons, numerous contusions, bruises and scratches - what have you been doing?
Quark: You mean, what have WE been doing? (Quark and Grilka laugh)
Bashir: Nevermind, I don't need that particular image running around in my head. I'll just treat you.
(Worf and Jadzia come limping in)
Bashir: What happened to you two?
Worf: We... um....
Jadzia: Well, um... if you must know, uh....
Bashir: NO! No, uh, I don't need that image either. In fact, I'm going to stop asking that question altogether! People can come in, I will treat them, and that's all!
Worf: (to Morn) I will apologize for this at a later time.... YOU ARE IN MY SEAT! (throws Morn to the ground)
Jadzia: Quark, Klingon mating rituals are... very... involved. It's not just a one night affair.
Quark: Two nights... whatever.
(talking about Klingon mating rituals)
Quark: And then what?
Jadzia: Well, either she accepts your offer, or she has her bodyguard shatter every bone in your body.
O'Brien: (talking about Kira) Who says we're fighting?
Bashir: Uh, word gets around. It's a small station.
O'Brien: It's a HUGE station!
Bashir: Not huge enough...
Quark: She said I had the heart of a Basai Master... whatever that is.
Worf: It is a poet.
Quark: A poet? I guess I could live with that.
Quark: This is ridiculous! I'm surrounded by corpses, my shoes are dripping in blood, and you want me to feel romantic?
Grilka: Why do you pursue me?
Quark: I only pursue those things I wish to acquire.
Grilka: Acquire?! Now you sound like a Ferengi again!
Quark: I am a Ferengi! That means I have a talent for appreciating objects of great value. And I believe you may be worth more than all the latinum in the Quadrant.
Quark: What if I just do what I did the last time a Klingon wanted to kill me? I throw my sword away, kneel down in front of him, and dare him to execute me. Yeah... he'll be humiliated, and slink away like a scolded targ.
Quark: My choices are to not show up, be branded a coward and lose Grilka, or die?
Quark: Oh, come on, now! There must be another way out of this! You people have rituals for everything except waste extraction! You must have a ceremony or a secret handshake or something I can do!
Jadzia: How do you feel?
Quark: Like a puppet! And I have some complaints for the puppeteer! You nearly wrenched my arm out of its socket!
Worf: The movement would not have hurt if you were in better physical condition!
Quark: Exercise makes me sweat.
The title of this episode is the second longest in Star Trek history. The longest is from Star Trek: TOS, "For the World is Hollow and I Have Touched the Sky".
Mary Kay Adams (Grilka) reprised her role from the DS9 episode "The House Of Quark".
Joseph Ruskin (Tumek) also played the same role in the DS9 episode "The House of Quark". Also on DS9, he played the role of Informant on the episode "Improbable Cause". He played the role of Galt in Star Trek: TOS episode "The Gamesters Of Triskelion". On Enterprise he played Suliban Doctor in the episode "Broken Bow Part 1 and 2", and on Voyager he played Vulcan Master in the episode "Gravity".
Phil Morris (Thopok) also played the role of Remata'Klan in the DS9 episode "Rocks And Shoals". On The Original Series he played Boy in Army Helmet (uncredited) on the episode "Miri". He also played Lt. John Kelly in the Voyager episode "One Small Step".
This episode marks the second and last appearance of Mary Kay Adams (Grilka).
This is the only Deep Space Nine episode directed by Andrew Robinson (Garak).
Cirroc Lofton (Jake Sisko) does not appear in this episode.
Par'Mach is Klingon for "love", but with more aggressive overtones.
This episode continues the story of the season three episode "The House Of Quark", in which Quark is named leader of a Klingon House.
Worf helping Quark to woo his ex-wife Grilka is based on the play Cyrano de Bergerac by the French playwright Edmond Rostand. But in Rostand's play both men are fighters, and Cyrano helps Christian by writing love letters and feeding him lines from the shadows as Chritian stands below their love's window.
Looking For par'Mach In All The Wrong Places
The title appears to come from a country and western song "Looking For Love In All The Wrong Places" by Johnny Lee. The song was featured in the 1980's movie Urban Cowboy.
Quark: War. What is it good for? If you ask me, absolutely nothing.
This is a reference to the song "War (What Is It Good For)", by Edwin Starr.