Peace Pipe - S2-E5
Continuity mistake: When Engine 51 rolls up to the house with the fire in the toilet and then also at the hydrant that Roy and Johnny lock off, Engine 51's license plate reads 110856 (different engine). However, right after Chet proposes a treaty, when Station 51 is dispatched to the "construction accident," just as the front bay door opens in the shot from inside the apparatus bay, Engine 51's plate reads 180174.