Episode 1.

I don't even trust myself. – Kim Seol Woo

Helping someone is more complicated than you think. When you're out there, dilemma never ends. – Kim Seol Woo

There is always a woman behind every case. – Kim Seol Woo

Love is a useful deception and tactic to a secret agent. However, whereas I am with someone who is high on the romance, I feel loneliness and indifference. – Kim Seol Woo

I'm a villain, the worst there is. – Yeo Un Gwang

When working undercover, how you end it is more important than how you start it.­ – Kim Seol Woo

The sympathy of a woman in love is safer than a bulletproof vest, but the wrath of a woman betrayed by her love is deadlier than a time bomb. The best way to end a relationship that has served it use is death. – Kim Seol Woo

There is a new king, so there are new rules too. – Mo Seung Jae

I can hit things with my head or a car, but not my lips. – Yeo Un Gwang

I don't do kissing scenes, but I'm a good kisser. – Yeo Un Gwang

Love isn't a sin, but a star like you dating is a sin. You shouldn't have gotten caught. – Cha Do Ha

Episode 2.

I am Ghost Agent K, a shadow without a name or reputation. My duty is a nameless battle to protect freedom and order. – Kim Seol Woo

First note about Yeo Un Gwang. He finds pleasure in harassing others, a total psychopath. He is tough on the weak and weak on the strong. – Kim Seol Woo

Believing the bodyguard and trusting him is fundamental in security. – Kim Seol Woo

Second note about Yeo Un Gwang. He is a spoiled brat who throws a tantrum when he doesn't get his way. A spoiled brat will be silent once he is taken away from his mom. – Kim Seol Woo

Third note about Yeo Un Gwang. He likes neither this nor that. He hates being recognized and not being recognized. The best things for a top star who doesn't know what he wants are explosive views, likes and comments. – Kim Seol Woo

You were told to resolve a crisis but you created one instead. – Cha Do Ha

Love stories are action for the heart. – Yeo Un Gwang

Nothing is more dangerous than an ex-girlfriend. – Yang Sang Sik

The more drastic and painful the parting, the more effective it is. – Kim Seol Woo

Episode 3.

"A true relationship for an actress like you is a luxury you can't afford. If you truly love someone in reality, when you act your eyes portray a lie."

They say you don't die when your heart stops; you aren't dead as long as someone remembers you. – Cha Do Ha

If you aren't loved, you are dead. That means I'm dead. – Yeo Un Gwang

I'm not saying you should die if you're forgotten. I'm saying don't forget and live. – Cha Do Ha

The dead won't come back to life just because you remember them. You should forget the dead. – Kim Seol Woo

I've fooled the toughest ones out there, but not my wife. She will kill me. – Lee Dong Hyun

Don't do anything so dangerous again. I want you to stay by my side for a very long time. – Yeo Un Gwang

Nothing is more precious than your life. Safety always comes first. – Yeo Un Gwang

That's why I thought we were meant to be, we met when we were both at our most desperate moment. – Cha Do Ha

People leave in order to find a reason to return. – Kim Seol Woo

The pain of betrayal struck me pretty badly. – Yeo Un Gwang

Faith, hope, and love cannot save a person. What saves a person are hatred and rage. – Kim Seol Woo

There must be no one above the king. I'm done bowing to a young punk. – Baek In Soo

Please let me get away from you. – Yeo Un Gwang

Episode 4.

Why do people believe what you say with words is the truth? – Kim Seol Woo

The truth, can you handle it? It's because you were there, and you were the only thing I could see. – Kim Seol Woo

During the course of mission, you often have to think on your feet. – Kim Seol Woo

I can't lie to him twice. – Ji Se Hun

Nothing says "I like you" more than jealousy. – Park Song Yi

I did it because I know how hard it is to be in such one-sided relationship. You're the only one who would end up heartbroken, jealous and worried. You can't get closer, but you can't leave either. Your heart breaks whenever you see that person, but you force a smile. I didn't want you to experience that. – Cha Do Ha

I realized over time, you don't know how to turn left or right. You only go forward. – Kim Seol Woo

Love is a useful deceit and tactic to a secret agent. The present target is Cha Do Ha. She is merely one of the many assignments, but I have a bad feeling about this assignment. – Kim Seol Woo

Episode 5.

I'm sorry, but I can't leave you. I wanted to end things between us and forget about it by being mean. I tried but I can't leave you. I have no choice. – Kim Seol Woo

Seducing beautiful women is your specialty. – Lee Dong Hyun

Song Yi: Your heart follows where your body leads.

Do Ha: Your heart leads and your body follows.

Dating is about reactions. It varies by the person and situation. – Kim Seol Woo

You are in for a heartbreak. – Yeo Un Gwang

My heart is with you and always will be. – Cha Do Ha

I bet she is thinking of me all day long. – Kim Seol Woo

There are times when doing nothing is the best reaction. – Kim Seol Woo

It's time for me to declare my feelings and win her over. – Kim Seol Woo

I was nice to you because I thought you had potential, but your loyalty lied elsewhere. – Baek In Soo

Episode 6.

Note about Cha Myung Suk. A con artist who survives on connections and bluff. To his family, he is complete nuisance. – Kim Seol Woo

I don't care about the process. Just bring me the result. – Mo Seung Jae

How long will you last just because you are good? – Baek In Soo

When you don't have anyone who is trustworthy, an obvious enemy may be safer. – Baek In Soo

Be happy, little sister. – Yeo Un Gwang

She is the person I need to protect, my VIP. – Kim Seol Woo

You have a strange way of drawing people in. – Cha Do Ha

You're a coward 'til the end. Get out of my life. – Cha Do Ha

He showed up if he needed something, and took off it things got inconvenient. – Cha Do Ha

Now, I will be leaving you. – Kim Seol Woo

Episode 7.

Your relationship with him, everything he said and did, do you think they were sincere? – Seo Ki Chul

My premonition for a disaster was right. – Kim Seol Woo

Episode 8.

I'm sorry for making you go through this. – Kim Seol Woo

Are you saying every moment you shared with me was a lie and a disguise? – Cha Do Ha

I must lie often and my days are filled with death and violence. You are the most dangerous person to me. – Kim Seol Woo

The truth is lonely and the loneliness is bitter. – Yeo Un Gwang

I don't need a hunting dog that can't hunt. – Mo Seung Jae

All he had to do was apologize. How could he disappear without saying a word? – Cha Do Ha

My undercover mission is over and Guard Kim no longer exists. – Kim Seol Woo

It was the very first mission in which I made a mistake. – Kim Seol Woo

He erased all traces of him and left. – Cha Do Ha

She loves both men. That could mean she loves neither of them. She is miserable because she made the wrong choice. – Jang Tae Ho

It's probably his silent rebellion saying he won't die alone. – Kim Seol Woo

Whether I'm with the NIS or a prosecutor, why does the process matter? As long as I catch bad people like you, I've fulfilled my duty. – Lee Dong Hyun

I don't want to take your hand, unless it's to handcuff you. – Jang Tae Ho

Mo Seung Jae: You need power to pursue justice.

Jang Tae Ho: Justice that doesn't abide by the rules is assault.

Money is the rule and power is the justice. – Mo Seung Jae

Episode 9.

It's about our family/ Money is not important. – Yeo Un Gwang

Jang Tae Ho: Which do you think is more important, money or honor?

Kim Sharon: Money, of course. In these times, you can buy honor with money. But ever since I met you, I have had a change of heart. I realized how sexy an honorable man who can't be easily bought is.

Family comes before friends. – Song Mi Eun

What's the point in seeing someone who left you? It's stupid to hold on. – Cha Do Ha

I will never step down again. – Yeo Un Gwang

Please stop leaving loose ends. – Mo Seung Jae

Don't be nervous. I'm always watching over you. – Kim Seol Woo

My career as a Black Ops Agent is already over. A Ghost who is no longer useful doesn't get a happy ending. – Seo Ki Chul

Episode 10.

It's easy to fool a lie detector, but it isn't easy to keep lying to yourself. – Seo Ki Chul

Don't chase the tiger. Burn down the tiger's lair. – Song Mi Eun

The truth is beyond what you can see. – Yeo Un Gwang

If you draw the sword, you should use it. – Yeo Un Gwang

I wanted to find you if I lost you. – Kim Seol Woo

I do not compromise my methods to achieve my goal. – Jang Tae Ho

I have a tactic, lovers tactic. – Cha Do Ha

This is my promise to return. – Kim Seol Woo

Episode 11.

Is every moment a part of a tactic for you? – Cha Do Ha

A secret agent never clocks out. – Kim Seol Woo

I have decided to just trust my heart. – Cha Do Ha

If by chance, I see you cry again, I will kill him myself. – Yeo Un Gwang

After being an actor for so long, I can just tell if someone is acting or being sincere just by looking at their eyes. – Yeo Un Gwang

If I have enough bullets, I can't miss. – Baek In Soo

Revelations 12

7 And there was war in heaven. Michael and his angels fought against the dragon, and the dragon and his angels fought back.

8 But he was not strong enough, and they lost their place in heaven.

Throw betrayal into the calculation, and it may be simpler than you think. Our side isn't always on our side. – Kim Seol Woo

Ghost Agent K, it is time for you to rest. – Jang Tae Ho

Episode 12.

The way they treat ghost agents hasn't changed. They use you when they need you, and they throw you away. Selfish bastards. A country that uses you and discards you is meaningless. I simply chose my family over a backstabbing country. – Seo Ki Chul

If it's the Lord's will, He will lead you to the right path. The path is in the Word. – Father Michael

For God does speak—now one way, now another—though no one perceives it. (Job 33:14)

During missions, there are times when you have to deceive your colleagues. – Kim Seol Woo

If it's going to hurt anyway, I would rather enjoy myself a lot now and then hurt a lot later. – Cha Do Ha

Stay with me as my family, my brother. – Yeo Un Gwang

Episode 13.

If you were going to throw me away, you should have gotten rid of me for good. – Kim Seol Woo

A person's nature doesn't change. Even with menacing antlers, a deer is still a deer, and a hunter is still a hunter. – Kim Seol Woo

Yesterday's ally has become today's most threatening enemy. – Kim Seol Woo

Why would a toothless fox be threatening? – Mo Seung Jae

He's someone you must not meet as an enemy. – Lee Dong Hyun

To a secret agent, the people he is surrounded by could serve as a weakness. – Yeo Un Gwang

When time passes, would I wonder why I ever felt this way? – Cha Do Ha

Here's a piece of advice. If you've decided to join our side, get your head on straight. Now, it's live or die, protect or lose. That is all. – Song Mi Eun

I believe you. I'll believe your lies too. When I'm with you, I want to be happy regardless of anything, because we're doing the lovers tactic. – Cha Do Ha

Episode 14.

She's a realist who uses her beauty and charm as weapon for protection and defense. – Kim Seol Woo

Believe only what you see. If you try to think beyond that, you'll always end up hitting a brick wall. – Song Mi Eun

One with power desiring money will fail and one with money desiring power will die. – Mo Byung Do

The lonely hunter, a riddle in his will. I've solved it. – Kim Seol Woo

I wanted to believe in your promise, for us to love each other and be happy together. But that mean you and I will have to work too hard for each other. The efforts needed for me to not let you go and your efforts to protect me. My head-on fight ends here. We will terminate the lovers tactic. – Cha Do Ha

Episode 15.

The past wrongdoings should be buried, so that history can't remember. – NIS Director Im Suk Hoon

You're the traitor! Have you been using us from the start? – Jang Tae Ho

I left him alone because he was doing what was right. Had I known it was a losing battle, I would have stopped him. – Lee Dong Hyun's Wife

It is not a losing battle. I will take over from here, by the law, by the rules. – Kim Seol Woo

I will not kill you. Instead, I'll make your remaining days a living hell. I hope you live a long life. – King Seol Woo

Let's continue with this mission. No more sacrifices. – Song Mi Eun

Love doesn't feed you. The more you're being chased unfairly, the more you have to eat well. – Cha Myung Suk

Justice will surely prevail. – Cha Myung Suk

Please remember this one thing. You are not alone. – Cha Do Ha

You're more naive than you appear. You put your whole trust in the person you should be most cautious of. – NIS Director Im Suk Hoon

No matter how hard they hide it, the truth always gets out. – Cha Myung Suk

You have to accept sacrifices in running a country. – NIS Director Im Suk Hoon

My husband is lying to me. I saw suspicion in his eyes. I'm sure there's a trap. – Song Mi Eun

Only the truth can save you. – Kim Seol Woo

Episode 16.

Seung Jae: Do you think this can change anything? The world cannot take your side.

Un Gwang: Who knows? Just once in a while, the world flips upside down. Today is that day.

NIS Director: What do you want?

Seol Woo: Crime and punishment. It's time for revenge.

Verification is irrelevant. Evidence is only real if it's in the hands of the powerful. – NIS Director Im Suk Hoon

She was never on anyone's side. She's just a mom protecting her child. – Kim Seol Woo

He is Mo Seung Jae, a third generation conglomerate head, a young prince in a greenhouse. He will never take a gamble with his life. – Kim Seol Woo

I don't need your apology. Accept your punishment, by the law, by the rules. – Kim Seol Woo

I did read your feelings. It was my feelings I didn't know back then. – Kim Seol Woo

Knowing her, I'm sure she's putting on a brave face but is crying inside. – Ji Se Hun

The truth can be painted differently. – Baek In Soo

Someone high up, someone with power, someone with a lot of wealth all seem like the sky. No, they are the dark sky controlling our lives. Where and to whom will I be the sky? We want to be the sky too, not dark clouds that press down on others but one that supports each other. I wish it could be a world in which we can all be blue skies to each other.

There is no other love for these two people. –Yeo Un Gwang    

I will end the Guard Kim tactic now. – Kim Seol Woo

Remember that my tactics may end, but life continues on. – Yeo Un Gwang

That promise was important to me, because I kept loving you. I thought we broke up 8 years ago, but I was wrong. My love lasted for so long. Let's break up for real now. Let's do it without guilt and without clinging on. – Yeo Un Gwang

I don't know when I'll return to be the person you know. – Kim Seol Woo

Do Ha: His fight never ends.

Un Gwang: Ir's because the world is wide, and there are many villains.

I can't put a price on my family's memories. – Yeo Un Gwang

I am Ghost Agent K, a shadow without a name or reputation. I have a good feeling about this mission. – Kim Seol Woo