When Amy is showing Jake the pregnancy test, the way she holds it switches when the shot changes from facing Amy to facing Jake.
"Mario Party" for the Nintendo Switch can be played on the TV, via Joy-Cons, but not the way Jake was playing it.
Hitting below the belt is forbidden in boxing. Charles should have been disqualified from his fight with Terry (as should Nana Boyle in her Navy days).
Wuntch's commendation bars lack the black "WTC" commendation, given to all NYPD officers who served on or in the wake of the 9/11 attack on the World Trade Center. Holt, Terry, and most high-ranking officers seen throughout the series have it. Wuntch has served in the NYPD at least as long as Holt, so she should have received the WTC bar. Also, most of the commendation bars Chief Wuntch wears are not issued by the NYPD.
Captain Holt wears his Commendation breast bar above his World Trade Center Breast Bar. When the WTC bar is worn, it is worn above all other medals, but below the American Flag bar.
Santiago is wearing 2 citation bars that are not issued by the NYPD. Also, NYPD regulations require that the American Flag bar be worn as the highest citation bar - something Santiago would have known.
When Captain Holt takes his refried beans out of the toaster oven, he uses his hand. The dish should be hot since he just removed it from the oven.
Holt asserts that Wuntch can't be dead because "zombies can't die." Most zombie stories include methods of killing them, usually involving destroying or removing the head.