The boys and the girls make a bet as to the sex of the new kid, Zoid, but Zoid comes from a planet where you are neither sex until your thirteenth birthday when you can choose it. When Zoid's thieteenth birthday does roll around, he or she refuses to reveal it. The only way the gang can ever find out is if Zoid gets a crush on one of them.
Casts:
Courtland Mead, Nicolette Little, April Winchell, Brian Doyle-Murray, Brian George, Justin Shenkarow, Pamela Hayden, Bill Fagerbakke, Diedrich Bader, Tara Strong, Mayim Bialik, Anndi McAfee, Rachel Crane, Tress MacNeille, Dan Castellaneta, Eddie Deezen