Wander Over Yonder (television) Animated comedy series on Disney XD, premiering September 13, 2013. Wander, an eternally optimistic intergalactic traveler and constant do-gooder, sets out across the galaxies with his quick-tempered but loyal steed and best friend, Sylvia, to spread good cheer and help anyone he can. Voices include Jack McBrayer (Wander), April Winchell (Sylvia), Keith Ferguson (Lord Hater), Tom Kenny (Commander Peepers). From Disney Television Animation.