One of the few Season 4 episodes where C.J. and Summer appear together. For whatever reason, and especially in the last half of the season, there were either Summer or C.J. episodes. If one had a story centered on them, the other wouldn't be in the episode at all.
The show's co-creators Douglas Schwartz and Michael Berk's mothers, Mimi Schwartz and Rose Berk appeared in the episode as the two women Mimi and Rose who were sitting down on the bench.