Geronimo Stilton Episode 15 Clean Sweep Episode Title:Clean Sweep.Episode Description:While Mouse City is affected by a wave of spectacular burglaries, Thea remains untraceable. It does not take more so that Sally will immediately put suspicion on her. Geronimo inquiry. Helped by Trap and Ben, he quickly discovers that the real culprit is none other than Prince Nogouda, an old acquaintance, and that the latter has been in search of a princess.