Eugene O'Neill | Eugene, Oregon | Eugène Delacroix | Eugene Onegin | Eugène Ionesco | Eugene | Vladimir Horowitz | Eugene Onegin (opera) | Eugene McCarthy | Pope Eugene IV | David Horowitz | Eugène Ysaÿe | Eugene Wigner | Eugene Field | Eugene Aynsley Goossens | Gene Eugene | Anthony Horowitz | Harold Eugene Edgerton | Eugene Levy | Eugène de Beauharnais | W. Eugene Smith | Pope Eugene III | Eugene Ormandy | Eugene Jolas | Eugene Fama | Eugene Cernan | Eugène Atget | David Eugene Edwards | H. Eugene Stanley | Eugene V. Debs |
His well-known roles include Ted Newton in Beethoven and Beethoven's 2nd, the voice of Zachary Sellers and Nick Mulligan in Focus on the Family's Adventures in Odyssey, Mark Foster on the sitcom Step by Step, and the voice of Eugene Horowitz in Hey Arnold!.
In 1996, while continuing on Step by Step, Castile added the vocal role of Eugene Horowitz on the animated series Hey Arnold!.