The owner of the End of Line Club, Castor is a program who seems inundated with all forms of entertainment-based ideals and identities. Though his club functions as an entertainment spot for programs, Castor is constantly bombarded with requests to seek an audience with a former program known as Zeus. It is only when Sam Flynn is brought to his club, that Castor relents, and escorts Sam to his private area, revealing that he is Zeus...a former name that he abandoned after CLU took over the Grid.Castor was said to have been trustworthy by an ISO program named Quorra, but soon it becomes apparent that Castor