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.
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.
Whether Swiper will be stopped or swipes the object depends on whether or not Dora asks the viewer to help stop him.
Season 4 is the only season to abandon the three-picture sequence for when Dora passes a location and instead Map is asked every time a location is passed, and he puts a checkmark on the passed locations to help keep track of how far Dora and Boots have went. The checkmark feature is later carried to the three-picture sequence beginning with Season 5.