First appearance of the second station mascot, the Basset Hound, Henry, and his accompanying tuba music cues.
First time that Captain Stanley's first name, Henry, is given. He had been addressed informally as "Hank" previously.
Anne Shedeen had earlier made appearances on the series playing Rampart Hospital Nurse Carol.
According to Wikipedia, the first Station Mascot, Boot, died in 1975.
As Roy and Johnny are heading to the Therapeutic couple for the first run, the guys are shown driving and the number on their helmets are white but in the 6 season their helmet numbers are green.