• Arthur (to Merlin) - "Were you born clumsy or do you work at it?"
  
• Merlin (to Arthur) - "If you weren't such a clotpole you'd see that!"
  
• Merlin - "Better to serve a good man than rule with an evil one."
  

• When Merlin agrees to free the Great Dragon.
  
• When Merlin and Cedric brawl in Arthur's room.
  
• When Merlin comes out of the mist after defeating Cornelius Sigan.

• When Arthur teases Merlin after Cedric tells Arthur that it is a honor to serve him.
• When Merlin calls Arthur a Clotpole.
  
• When Merlin 'accidentally' hits Cedric with a beating stick.
• Cedric makes Merlin trip over and dropping the chamber pot onto Arthur (deleted scene)

• When Merlin is really upset that Arthur thinks he is an idiot.
  
• When Arthur comes to sort of apologise at the end and Merlin looks so happy to be Arthur's servant again.
• When Merlin says "Everything I do is for him [Arthur]."

• Levitation spell used to raise a plate to shield Gaius from a poisoned arrow in Cornelius' tomb
  
• Levitation spell used to throw a spear at the charging giant boar.
• A secret and very powerful spell told to him by the Great Dragon (in exchange for his freedom) to trap Cornelius Sigan's soul back in the jewel.

More Merlin's Powers

• Review The Curse of Cornelius Sigan

More Season 2 Discussions

The Once and Future Queen