I think these deserve a special mention, though:
Arthur's "get off the crazy pills, old man" look, his "OMG I KILLED A UNICORN CAN'T WAIT T
And because this scene was just too pretty:
- I'll take your test, but not until he's released.
- That is not possible. Merlin is part of the test.
- I had no idea you were so keen to die for me.
- Trust me, I can hardly believe it myself.
- ... I'm glad you're here, Merlin.
- You never cease to surprise me. You're a lot smarter than you look!
- Is that actually a compliment?
- No! I will drink it!
- As if I'd let you.
- Listen to me.
- You know me, Merlin, I never listen to you!
- You killed him! I was meant to protect him!
Ummm, you could've just asked Shipper Dragon. I'm sure he could've given you a list with proof that Merlin's in Arthur's heart;)