Robot Trains (2015)

S1E27 Victor is in Danger

After an extended period of seclusion, Area V's energy becomes erratic, leading to the melting of snow and the subsequent collapse of the Ice Cave, trapping Victor inside while he explores. Kay and Stella rush to rescue him, but Victor urgently requires Selly's assistance. Unfortunately, the rising temperatures across Area V impede Alf, Duck, Selly, and Duke's efforts to reach him in time.