In what episode does a cat steal Zero's mask


In what episode does a cat steal the zero mask, so that Lelouch has to chase
it while he is being chased by all the girls from the school?




Episode 6 (The Stolen Mask / 奪われた 仮面). The description is
[here](http://en.wikipedia.org/wiki/List_of_Code_Geass:_Lelouch_of_the_Rebellion_episodes).

