S03:E15 - Finn

When Challenger constructs an experimental machine that harnesses the plateau's energy lines, the explorers hope that they have found a way back to London. The device may prove dangerous, but finding a way out of the Lost World seems worth the risk. After their test run lands them in the they same place that they started, they assume failure and return to the Treehouse--only to find that it's not there. When Roxton is abducted by an armed tribe of slavers, they discover that the machine has sent them not across space, but time--placing them about 100 years in the future. While the explorers discover the truth about this new apocalyptic landscape, they meet a woman named Finn who tries to join their return trip back to the 20th century.