When Dad sees Timmy's computer he mentions that he shouldn't be on those kinds of websites implying explicit material.
Running gag: people announcing their entry by saying (name of person) i'm respecting your privacy by knocking but asserting my authority as your mother/father by coming in anyway.
This episode was made in 2001 according to the credits.
This episode was originally aired on October 18, 2002, but was pushed back it was premiered on January 20, 2003.