First appearance of Boot, the first mascot of station 51.
First mention of Gage being of Native American heritage. Randolph Mantooth, who played Gage, is part Native American, with Seminole, Cherokee, and Potawatomi lineage.
Chet playfully hints at becoming a paramedic as part of his snide comments about his paramedic comrades not having to participate dealing with a brush fire. Later in the series, Chet does effectively do that to a degree by becoming informally a basic EMT medic for the station; a medic who performs basic assistance like first aid while the official paramedics perform the medical duties that only they are certified for.
Debut of John Travolta.
This is John Travolta's 1st credited acting job. He is supposed to be 16. In actuality, he was 18 at the time.