he said biliyorsun, and it was not a question.

Bad guy: Metin abin selam söyledi. Valizanız buymuş. Emanete bakmak yasak, biliyorsun.

Girl: Biliyorum.

Okay, let me see if I even understand this.

Bad guy: Your big brother Metin said hello. This was your suitcase. It is forbidden to look at the thing entrusted, you know. 

Girl: I know.

I don´t think I really understand "buymuş." Can you explain it for me? Is it "bu" but with an indefinite past tense? "I´ve been told this was your suitcase." Is that the meaning of what he is saying?

On the show, I can hear and understand only bits and pieces of the dialogue. For the most part, it is just a jumble for me. But it is slowly getting better. Yavaş yavaş.

Çok teşekkür ederim!

A new question from watching "Kara Para Aşk": One woman welcomes another to a party, and the second woman responds with "Hoş buldum." Is there something different about this other than it is in first person singular rather than the usual first person plural? The second woman doesn´t seem very pleased to be talking to the woman who welcomed her. Does "hoş buldum" somehow signal this? I had never heard it used before. Usually people respond "hoş bulduk," even if they are just one person, yes? ... Hope this isn´t a totally stupid question. ... Teşekkürler!

Good questıon. I don´t think there is a signal in it. Hoş bulduk is what you may hear generally. However, sometimes people say it in singular form "Hoş buldum" which may seem the  capitalistic /individualistic form of Hoş bulduk.

* If you [plural] are welcomed by someone then you should say Hoş bulduk [on behalf of other friends who are with you at that moment]

* If you [singular] are welcomed by someone it both ways are accepted.

I´m not sure of the meaning in this case, but, here is a "supposedly" good link on miş:

http://www.demturkishcenter.com/mis-suffix-in-turkish/

Another question from watching "Kara Para Aşk": I hear people saying "ey," or perhaps it´s more like "oh," and I am assuming this means "So?" Or perhaps: "So what do we have here?" But I notice that sometimes people say it in two or more syllables. They stretch it out so it sounds something like: "Ey-ey?" or "Oh-oh?" 

Here is an example, at about 1:49 on the time counter. The male character says it as he enters the kitchen:

https://www.youtube.com/watch?v=9bIE8ZaiuDA

Can you please explain this inflection and what it means? Teşekkürler!

Trip, Are you sure you have the right link/time?

I looked, it shows up as ´Kara Para Aşk - Kara Para Aşk 16.Bölüm´ but from 1:30 to 2:00, I didn´t see anyone enter a kitchen?

It is on 1:49:40

He said that to his girlfriend, because she was in kitchen and that was surprise for him.

So it is something like: "So, what do we have here?!" At least, that is what we might say in English. ... Thank you!

And I´m sorry, denizli, if I didn´t render the time right. Technology is not my strong suit.

Here is a note one character writes to another on "Kara Para Aşk" (his handwriting and punctuation are not so good, so I´m guessing in a couple of places):

"Dün geceki sohpet için teşekkürler. Aramızda kalmasına da memnun oldum. Haftaya pazartesi Roma tekvimin hazır ... Şimdiden hepimize iyi yolculukları. Gitmeden biraraya gelicez. Bol şans."

My try:

"Thanks for last night´s chat. I am pleased at its staying between you and me. On Monday of next week, Rome. Your calendar is ready. ... Right now, good travels to all of us. Without going together ???. Good luck."

I have no idea what "gelicez" means. If that is indeed the right spelling. Bana yardım edebilir misiniz? Teşekkürler!

A correction on one line: Şimdiden hepimize iyi yolculuklar.