Once Brooke convinces the Geotopians that preventing the asteroid's fall is more important than their lost youth, they and The Herd help with Buck's plan, which is to fill up a geyser with the crystals so that the pressure launches them into space to draw the asteroid away. The dromaeosaurs attempt to intervene, but Buck convinces Roger that they will not be able to survive the asteroid, and he in turn convinces Gavin and Gertie to help. The plan works, and the asteroid is pulled back into space. The Herd then departs back home, including Sid, who parts ways from Brooke, but just after they leave, an asteroid piece falls inside a hot spring, giving it rejuvenating properties and making the Geotopians and Sid's grandmother, who stayed behind with them, regain their youth. After The Herd returns, Manny reconciles with Julian, Peaches and Julian celebrate their wedding, Diego and Shira become heroes to the kids who were scared of them before, and a rejuvenated Brooke appears during the ceremony to reunite with Sid.