Complex sentence: He appears in "Happy's Valentine", where he brings a date to the Camdens' while his parents and Eric and Annie are out of town, joining the wild party that Mary and Keesha's friends are throwing.
Split into simpler sentences: He appears in "Happy's Valentine" where he brings a date to the Camdens' while his parents and Eric and Annie are out of town. He joins the wild party that Mary and Keesha's friends are throwing.