"There's a holdup in the Bronx Brooklyn's broken out in fights There's a traffic jam in Harlem That's backed up to Jackson Heights There's a scout troop short a child Khrushchev's due at Idlewild Car 54, where are you?"
Artistic License - Geography: It's impossible for a traffic jam in Harlem to be backed up to Jackson Heights, since Harlem is the northernmost part of Manhattan, and Jackson Heights is in Queens.
Cloudcuckoolander: Toody, who could go on and on about nonsense while Muldoon casually tuned him out.
This became most apparent when a new recruit was added who Muldoon could actually talk to about intellectual/cultural subjects. Unfortunately, it backfires as Muldoon gets exhausted and demands to be put back with Toody, saying "Yes, but Toody talked nonsense."
Couch Gag: Each opening credit sequence had Toody and Muldoon doing different things as they drive in the squad car such as: dropping an ice cream cone, playing checkers, Gunter opening his lunch box and finding everything BUT his lunch, Gunter dangling a rubber spider in front of Muldoon as he drives.
The Convenient Store Next Door: One episode is based around an eatery next to a bank. A single scene at the end of the episode replays the entire plot with the buildings' next owners, who are posing as stamp dealers.
The Film of the Series: Filmed in 1990 but not released until 1994, the film basically tried to turn Car 54 into a Police Academy type movie. Original cast members Al Lewis and Nipsey Russell appeared as their original characters.
Spiritual Successor: Barney Miller from the 70s. And like that show, Car 54 was often suggested by actual Police Officers to be the most realistic police show on television at the time.
Spotting the Thread: The episode "Here We Go Again" the plot is started off with this. An old criminal discovers from one of the main characters that the only thing they had done wrong on a heist they pulled many years ago and served jail time for was that they had disguised as police wearing winter uniforms instead of summer uniforms. This set off a funny episode as the criminals pull together their now-aged gang to pull off the heist correctly this time. They pull it off, but are all too weak to pick up the gold bars. They then escape the bank wearing the correct summer police uniforms... from the 1920's, not the Present Day (at the time the episode aired) 1960's uniforms.
Whole Plot Reference: The episode "What Happened to Thursday?" revolved around Toody and Muldoon trying to stop the Schnausers' weekly fight, which always happened on a Thursday. So, they do everything they can to convince her that it is Friday, leading her to accuse them of trying to "Gaslight" her.