Whenever Swiper manages to steal items from Dora and Boots, he exclaims "You'll never find it now!", but the stolen items are always found and retrieved within a few seconds.
This is the longest running Nick Jr. show that continued for approximately 19 years.
In Season 3, Diego was introduced.
Season 2's "Rojo, the Fire Truck" is the first time Dora (or someone else) asks the viewer what path the location is on, which also occurs in some episodes of Season 4 and becomes a standard basis from Season 5 onward.