Merlin: (About Mordred) Why did you spare his life?
Arthur: He couldn't come after us.
Merlin: He was leading us to our deaths!
Arthur: He showed us kindness.
Merlin: You should've killed him!
Arthur: What is wrong with you?
Merlin: You had the chance!
Arthur: We escaped, didn't we?
Merlin: Next time, we might not be so lucky.
Arthur: I love your optimism.