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The character of Abed is based on a real person also named Abed: Abed Gheith, who played a little role in series.

Each episode ends with a credit as "A Dan Harmon/Russo Brothers _________". The last word(s) include "Fiasco", "Parade of Tears", "Diorama", "Bridal Shower" and "Tantrum".

In the fourth season (without creator Dan Harmon's involvement), the main cast were given more freedom to improvise.