I would also add Born Under a Bad Sign an how it plays upon Sam's arc of the season.Does anyone have a list of the mytharc eps, by the way? I'm just curious so I know when they're coming up.
In season two
Episode 1--In My Time of Dying
Episode 5--Simon Said
Episode 9-Croatoan
Episode 10--Hunted
Episode 11--Playthings
Episode 13--Houses of the Holy
Episode 21--All Hell Breaks Loose part I
Episode 22--All Hell Breaks Loose part II
These are your episodes dealing with the mytharc.