Hen fears for Karen's life when an explosion rocks her science lab on the day she brings Denny to work with her.

The 118 race to the rescue to a renaissance faire; then an office building. when an overbearing boss is poisoned; Athena fears for May's life when she encounters a disturbed young man; Uncle Buck babysits young Jee-Yun as Maddie and Chimney begin house-hunting; Eddie and Carla prepare Christopher for his first school dance.