Season 2

2x01 Curse og Cornelius sigan

Arthur: Guinevere?
Gwen: Sire.
Arthur: That thing could've killed you.
Gwen: And it still might! Sorry, Sire.
Arthur: No. My pleasure.
Gwen: I'll get you something to stop the bleeding.
Arthur: Guinevere. I wanted to say...just, always surprise me.
Gwen: Is that it, Sire?
Arthur: That's it. Oh, and uh...thank you.

2x04 Lancelot& Guinevere

Merlin: Why can't you just admit your feelings for Gwen?
Arthur: *scoff*
Merlin: It's so obvious. A blind man could see it. Is it really that hard to admit you like her? Just say it.
Arthur: I can't! How can I admit that I think about her all the time. Or that...I care about her more than anyone. How can I admit that...I don't know what I'll do if any harm comes to her?
Merlin: Why can't you?
Arthur: Because nothing can ever happen between us! To admit my feelings knowing that...hurts too much.
Merlin: Who's to say nothing can happen?
Arthur: My father won't let me rescue a servant. Do you honestly believe he'd let me marry one?
Merlin: You want to marry Gwen?
Arthur: No! No...I...I don't know...It's all talk, and that's all it can ever be.
Merlin: When you're King, you can change that.
Arthur: I can't expect Guinevere to wait for me.
Merlin: If she feels as you do, she'll wait for you.

[Arthur and Merlin enter the room. Arthur jumps into the cage and pulls off his mask]
Gwen: Arthur!
[Arthur frees them, tosses Lancelot a sword, pulls Gwen behind them while they fend off the Wilderin]
Arthur: What are you doing here, Lancelot?
Lancelot: I came to save Gwen. What about you?
Arthur: Likewise. Get behind us.
[Hengist aims a crossbow at the three in the cage]
Merlin: Ic bebíede fealle.
[chandelier crashes, Hengist dodges it]
Arthur: The tunnel, that's our only chance. Merlin! Don't sit there cowering, let's go!
Hengist: After them!
[Merlin jumps over the cage wall and Hengist enter through the door]
Lancelot: Take Guinevere! I'll hold them off.
Gwen: No!
Arthur: Guinevere, we have to go!
[Arthur grabs Gwen and takes her down the tunnel]

2x13 the last dragon lord

[Gwen treats Arthur's shoulder/chest wound in the infirmary]
Gwen: You shouldn't've risked your life.
Arthur: I wasn't going to let anything happen to you.
[she reaches to put the towel down, but Arthur catches her hand and presses it against his chest, covering it with his hand. she smiles. Gaius notices and smiles at the pair. Merlin approaches him]

[Gwen runs to Arthur and hugs him]
Gwen (whisper): I thought I'd lost you.