The Littles
A Little Gold For a Lot of Trouble
S1 E12:
Henry and Marie Bigg are chasing a rabbit outside the city limits and don't see a "Danger: No Trespassing" sign posted nearby an old, abandoned mine shaft. In trying to catch the rabbit, they try to explore the mine but instead fall through the rotted wood framing. Fortunately Dinky is flying overhead and observes the incident. He returns home to get help.