You'll need to check your local PBS listings for the time, but the October 25th episode of Arthur contains a pair of stories centered around comics.
In the first story, "Falafelosophy" author, Neil Gaiman (Coraline, The Graveyard Book) guest stars as himself (himself if he were a cat) he provides inspiration for one of the characters (Sue Ellen it looks like) who is trying to write and illustrate her own graphic novel.
UPDATE: You can watch this portion of the episode by going here.
The second story, "Tales of the Grotesquely Grim Bunny" is a story that centers around the local comic book store.