When Gambini escapes from being tied up in the creek and is under water for over a minute, he finally breaks the surface and walks up to the praise of the on-lookers. Note that he isn't breathing hard, nor does he appear overexerted in any way.
Actress Martha Nix plays a sweet, quiet new student named Amy in this episode. Amy is never seen again, but Nix also appeared three years ago, in Season 5's The Sound of Children, as a girl named Holly. Ironically, in that Season 5 episode, Nix's character was a little girl who had a huge crush on the older Albert, but he wasn't interested. Now, in this episode, it's Albert who really likes her, and although she's nice to him, she's not all that lovestruck.
Charles: ((about Albert) My son's going to be a doctor, not a patient.
Stephen Manley, who portrays Marco here, went on to play a teenaged Mr. Spock in the movieStar Trek III: The Search for Spock.
Jeri Taylor is better known for shaping the Star Trek Universe with her work on The Next Generation, Deep Space Nine and Voyager. She even wrote the "bible" on Captain Janeway with her "Offical" Star Trek novel-Pathways & Mosaic.
This episode makes a strong statement about hero worship -- worshipping entertainers (such as Gambini) vs. following the paths of true heroes (i.e., Dr. Baker).