Hey Arnold!
Grandpa's Sister / Synchronized Swimming
S4 E16:
Grandpa's sister, Mitzi, shows up out of the blue to grace the boarding house with her presence. / When Coach Wittenberg needs to form a synchronized swim team to save his job, he recruits Arnold, Gerald and the rest of the gang to compete.
Starring
Lane Toran, Jamil Walker Smith, Francesca Smith