Art Carney forgot to take back the 'parcel' he put in Ralph's icebox. The paper bag that contained the worms. It's obvious that he was supposed to do that before he left Ralph's apartment. He comes back after to get it.
Jackie Gleason has to feed the word "applicant" to the actor playing the president of the lodge when he stumbles over his line.
At the Raccoon Lodge meeting, some member's names are seen in the background on a chalk board. Kramden is spelled "K-R-A-M-D-O-N".
Jackie Gleason flubs a line: "Brother Kramden . . . . Brother Norton is a nut!"