Miami Dolphins fullback Larry Csonka guest stars as a painter intoxicated by paint fumes. He can be seen wearing one of his Super Bowl rings as he fights with Tim Donnelly's character, Chet Kelly.
First time guest stars' names appear in the episode credits at the top of Act I, as opposed to their previous position during the end credits.
The New York City cop that Art Frommich (Shelley Berman) referenced is Frank Serpico; who blew the whistle on corruption within the police department which led to the investigation by the Knapp Commission.
This is also when Johnny and Roy have new shirts that have the official paramedic patch on the left sleeve. Their helmets also have the paramedics decal on them. Also when Marco has grown a mustache.
First appearance of Squad 51 helmets with the number in green; previously, the number was white.