Ed and Archer are bargaining when Roy enters.
Roy: Ed! What are you doing?
...First time I've ever seen Roy call Ed by his name. O__O
Ed: Sorry, but dogs run away.
Roy: Then the master has to discipline the dog.
Ed" >< "Master?"
and in the same episode -
Roy: Why didn't you come to me for help?! (looking genuinely pissed off)
Ed: (looks shocked, but then smirks)