Sam: "Hello! I spent all that time trying to get through to you. Dean calls once and it's 'Hello'!"
Cas: "Yes."
Sam: "So what... you like him better or something?"
Cas: "Dean and I do share a more profound bond. I wasn't gonna mention it." 6.03
"When a claim is made on a living soul, it leaves a mark, a brand." Cas zu Dean 6.03
Remember the brand on Dean's shoulder?
Dean: "What happened to you, Cas? You used to be human, or at least like one."
Cas: "I'm at war." (...)
Dean: "What happens if Raphael wins? Cas, why didn't you tell us this?"
Cas: "I was ashamed. I expected more from my brothers. I'm sorry. Now I need your blood." [Cas grabs Deans's wrist and Dean lets him slice his palm.] 6.03
"Dean, my 'people skills' are 'rusty'. Pardon me, but I have spent the last year as a multidimensional wavelength of celestial intent." Cas 6.03
Dean: "Well, recap it for our wingman." [Castiel appears]
Samuel: "This is Castiel? You're scrawnier than I pictured."
Castiel: "This is a vessel. My true form is approximately the size of your Chrysler building."
Dean: "All right, all right, quit bragging." 6.07
Dean: "Well, she's smart, I'll give her that. I was gonna kill her, too. 'Course, I'd have given you an hour with her first."
Cas: "Why would I want that?"
Dean: "Thanks, Cas. Hadn't it been for you..."
Cas: "Crowley was right. It's not going well for me upstairs."
Dean: "If there's anything we can do..."
Cas: "There isn't. I wish circumstances were different. Much of the time I'd rather be here."
Dean: "Look, Cas, we know you got a steaming pile on your plate. There's no need for apologies. We're your friends." 6.10
Crowley: "You're distracted. And that makes me nervous!"
Cas: "I am holding up my end."
Crowley: "Ah yes, but is that all you holding, eh? See, the stench of that Impala's all over your overcoat, angel."
"I'm only gonna say this once. If you touch a hair on their heads, I will tear it all down. Our arrangement – everything. I'm still an Angel, and I will bury you." Castiel to Crowley 6.10
Dean: "You need new friends, Cas."
Cas: "I'm trying to save the ones I have, Dean." 6.17
"The other angel. You know, the one in the dirty trenchcoat who's in love with you. I don't care." Balthazar to Dean 6.17
Dean does not deny it. Everyone just completely rolls with it like it's a well-known fact.
Dean: "Without your power, you're basically just a baby in a trenchcoat."
Cas looks upset.
Sam: "I think you hurt his feelings." 6.19
Bobby: "I'm thinking maybe it's time you make a call."
Dean: "Why's it always gotta be me that makes the call, huh? It's not like Cas lives in my ass. The dude's busy." (Cas shows up right behind Dean.) "Cas, get out of my ass!"
Cas: "I was never in... your..." 6.19
Cas: "I'd come if I could."
Dean: "Yeah, no, I-I get it. No worries. But, Cas, you'll call, right? If you get into real trouble..." 6.20
Sam: "So what now?"
Dean: "We'd call Cas."
Sam: "What?"
Dean: "This is usually the point where we would call Cas for help."
Bobby: "We talked about this."
Sam: "Yeah, Dean."
Dean: "No, you talked. I listened. This is Cas, guys. I mean, when there was no one... and we were stuck, and I mean really stuck, he broke ranks. He has gone to the mat cut and bleeding for us so many freakin' times. This is Cas! Don't we owe him the benefit of the doubt at least?!" 6.20
"Cas is family!" Dean to Bobby and Sam
"The worst part was Dean trying so hard to be loyal with every instinct telling him otherwise." Cas to Gott 6.20
Dean: "It is good to see you, Cas."
Cas: "You all right? I'm glad I found you. I come with news. I firmly believe Crowley is alive."
Dean: "Yeah. You think, Kojak? Well, Bobby, what do we think about Cas saving our asses... again?"
Bobby: "I think we owe you an apology."
Sam: "We've been hunting Crowley this whole time... and keeping it from you."
Bobby: "We thought... you were working with him."
Cas: "You thought what?"
Dean: "I know, it's crazy, right?"
Bobby: "It's just that you torched the wrong bones. It doesn't matter. We, we were wrong."
Cas: "You know... you could've just asked me."
Dean: "And we should have. We never should've doubted you. It's... I just hope you can forgive us."
Cas: "It's forgotten."
Dean: "Thanks." 6.20
Dean: "I'm not gonna logic you, okay. I'm saying don't, just cuz. I'm asking you not to, that's it."
Cas: "I don't understand that."
Dean: "Look, next to Sam you and Bobby are the closest thing I have to family. That you are like a brother to me. So if I'm asking you not to do something... You gotta trust me, man." 6.20
"I'm doing this for you, Dean. I'm doing this because of you." Cas to Dean 6.20
Cas: "I did it to protect you. I did it to protect all of you. (...) I had no choice."
Dean: "No, you had a choice. You just made the wrong one." (...)
Cas: "It sounds so simple when you say it like that. Where were you when I needed to hear it?"
Dean: "I was right here. Where were you?" 6.20
Castiel was there, in Lisa's garden, and decided that Dean's life would be a better one if he wasn't part of it anymore.
"So I went to an old friend for help. But watching him, I stopped. Everything he sacrificed... and I was about to ask him for more." Cas to Gott 6.20
Castiel's been hanging around invisible watching Dean.
Dean: "You should've come to us for help, Cas."
Castiel: "Maybe. It's too late now. I can't turn back now. I can't."
Dean: "It's not too late. Damn it, Cas! We can fix this!"
Cas: "Dean, it's not broken. Run. You have to run now! Run!" 6.20
https://www.youtube.com/watch?v=2gsJ1iOea6w
"I believe it's what you would call a tragedy from the human perspective. But maybe the human perspective is limited." Castiel 6.20
Castiel: "I had no idea Crowley would take Lisa and Ben. (...) I thought you said that we were like family. Well I think that too. Shouldn't trust run both ways?"
Dean: "Cas, I just can't..."
Castiel: "Dean, I do everything that you ask. I always come when you call, and I am your friend. Still, despite your lack of faith in me, and now your threats. I just saved you, yet again. Has anyone but your closest kin ever done more for you? All I ask is this one thing."
Dean: "Trust your plan to pop Purgatory?"
Castiel: "I've earned that, Dean. I came to tell you that I will find Lisa and Ben, and I will bring them back. Stand behind me, the one time I ask." 6.21
Cas: "I'm sorry."
Dean: "I don't care." (It only hurts when it means something. And the pain is written on Dean's face.) ...
Cas [walks up to Lisa and places his hand on her forehead, healing her]: "She's fine now. She'll wake soon. Dean, I said I'm sorry and I meant it."
Dean: "Thank you... I wish this changed anything."
Cas: "I know. So do I. All of that aside, I just wanted to fix what I could." 6.21
"Listen to me. Listen, I know there's a lot of bad water under the bridge, but we were family once. I'd have died for you. I almost did a few times. So if that means anything to you... Please. I've lost Lisa, I've lost Ben, and now I've lost Sam. Don't make me lose you too." Dean to Castiel 6.22
Pinterest folder to season 6:
https://www.pinterest.de/april31415/destiel-canon/godcas-leviathancas-s6-705/
video Destiel moments from season 6:
