Episode Title:Little Mouse Big City.Episode Description:Boss Mouse's nephew Lance invites Eckhart to visit him in the city. During his stay in Lance's house, Lance shows Eckhart a family heirloom, a cat's tooth, belonging to Lance's great-grandfather. As they tour the city, Lance accidentally drops the tooth into the sewers, prompting Eckhart to jump down to retrieve it. The tooth ends up in the hands of a sewer rat, and after a chase through the sewage waters, the tooth is embedded in the rat's back. Lance offers to pull it out in exchange for the rat returning the tooth, which allows Lance to reclaim the heirloom. Using a trick with the North Star that Tomis taught him, Eckhart is able to guide Lance back home.