Well, with the new season comes many new changes. There's quite a few, so I've broken them down into two categories:
FORMAT CHANGES
• Probably the most noticeable change is in the first elimination round, which used to be known as “The Moat”. For Season 3, The Moat has been converted into the Rapids. Water bubbles up from a spring surrounded by greenery in the audience section closest to the temple, then flows downward in waterfalls into the Rapids, which contains several large randomly-placed Jacuzzi-jets, and a constant flow of water. Occasionally, the speed of the flow will be increased for more difficult crossings, and if players are swept across their marked borders, they must go back and try again. Foam is also added occasionally to make crossing the Rapids more difficult. Crossings of the Rapids are also considerably more challenging than its predecessors.
• The gongs are now all placed on small, moss-covered rock platforms. Both players must be on this platform before the team can hit their gong and qualify for the next round.
• A completely different intro is used for the third season. It always starts off with a short dialogue between Kirk and Olmec, before Olmec announces the title and the titlecard appears as the camera moves through areas of the set near the end of the Rapids. When Kirk’s name is announced, a wide shot of the set showing the Rapids with the Temple as a backdrop, and then we cut to Kirk’s entrance.
• In addition to the intro, Kirk and Olmec interact a lot more during the show, talking and joking with each other in between events.
• Dee Baker now announces the prizes as Olmec instead of himself. The prize plug narrations are now much slower in Olmec’s voice and are shortened mainly because of this.
• When events are being explained by Olmec an animated screen pops up in the bottom-right corner, demonstrating how the event will be performed using computer-generated characters. A full screen animation is used for the Temple, with each layout getting a prerecorded rundown demonstrating each room’s objective.
• And finally, the credits now flash in the bottom half of the screen the moment the Temple Run finishes (as in, time runs out or when the player exit the Temple) to save time. Well, at least this way, Nickelodeon can't crunch them.

SET CHANGES
• All gaps that can be filled have been filled with additional foliage. Less and less are the pieces of evidence that these grounds were once inhabited, and if there are, they appear to be extremely old, some statues and idols lying in the plants, broken.
• Large boulders are present all around The Steps of Knowledge, and the barrier between the levels of the set is made of rockwork, covered in moss.
• A mountain is strategically placed at the end of the Temple Games floor, near the innermost corner of the temple. It serves multiple purposes: it resembles the Aggro Crag to some extent, with paths on the sides to climb in various temple games, as well as a rock climbing wall running down the middle for other games. The mountain also changes as the season progresses: in the beginning of the season, the mountain has very simple features, but by the middle, there’s swamps, traps, and massive boulders blocking the pathways up.
• A wooden rope bridge has been built at the end of the Rapids, and it connects the audience side of the Rapids to the main set. It serves as an observation platform for Kirk to stand on during crossings, as well as a place for the cameramen to get an alternate shot of the Rapids, with the Red Jaguars in the foreground instead of the Silver Snakes.
• The audience sections have been rebuilt as well. There are various “boxes” (more for easier identification of seating for the audience), and they are built in a staggered alignment—the first box is high, the second is low, the third is high, et cetera—and the gaps between them are filled with plants. Underneath one of the boxes is a cave, sealed up by a bamboo gate which opens only during the intro sequence, when Kirk emerges from it.
• Lighting has also changed. The entire set is lit only by a few powerful yellow-orange lamps from the rafters, so that the set is fairly dim. It resembles the minimal sunlight that actually penetrates down to the forest floor of a typical tropical jungle.
• Gone is the bare stone Temple Games floor. A texture that resembles dirt has been painted on the Temple Games floor to make it look like a clearing in the jungle rather than a sign of inhabitance, and vines creep across various areas of it.