The Gymnasium used by the Station 51 crew to play basketball, is the same Gymnasium used in Back to the Future for the scene where Marty and his band audition for the dance, and are told they are too loud by Huey Lewis. It is the McCambridge Recreation Center, in McCambridge Park, at 1515 Glenoaks Blvd, in Burbank.
The plumber arrives to fix the sink at Station 51 and says, "... gotta be over at 127 later this afternoon." Station 127 is the actual fire station (located in Carson, California) that was used for exterior filming to represent the fictional Station 51 in the show.
The episode ends uncharacteristically, with a basketball game, instead of a typical large scale rescue or fire.
At least Twenty-third time Dispatcher has been seen & heard. The video portion is likely stock footage. Tha audio matches the call.