What is the title of the third episode of Season 2 of “Fraggle Rock: Back to the Rock” and what key discovery does Mokey make in this episode?

The title of the third episode of Season 2 of "Fraggle Rock: Back to the Rock" is "When Mokey Met Lanford." In this episode, Mokey makes a key discovery that leads to significant interactions with Doc and Sprocket, adding depth to the storyline.