Winter Bestival; The Mystery of Missing Trees

S1 E4: After a snowstorm, Rev and Avery compete for title of Champion of the Winter Bestival! Avery is determined to hold her title from last year. Rev's Dad suggests a "slow and steady" approach to win. / When Rumble wakes Rev in the middle of the night, they hear a strange sound, and see lights in the forest. The next day, Ben encourages them to investigate further.