This is the first appearance of Eugene Contreras in the series.
This is the first appearance of Doug Ptolemy in the series, but only as an uncredited walk-on. He'll be a featured (credited) player in the next episode.
By this time, You Can't Do That on Television was becoming (or had become) Nickelodeon's top-rated show, which explains the self-puncturing opening joke of preempting "the most popular children's show on television" for an episode of You Can't Do That on Television.
As part of a running joke, "Nietzsche " is misspelled on the board as "Nietchy" in a quote that's often attributed to Socrates.