Question: In which show about a forth grader who lives with his grandparents in an inner-city boarding house did Christopher Castile voice a character?

Context paragraphs:
List of Hey Arnold! episodes: "Hey Arnold! " is an American animated television series created by Craig Bartlett that aired on Nickelodeon from October 7, 1996 to June 8, 2004.  The show centers on a fourth grader named Arnold, who lives with his grandparents in an inner-city boarding house.  A total of 100 episodes aired over the course of 5 seasons. "" , a feature-length film based on series, was released theatrically on June 28, 2002. "" , a television film based on the series, is scheduled to premiere in November 2017.

Moon Mullins: Moon Mullins, created by cartoonist Frank Willard, was a popular American comic strip which had a long run as both a daily and Sunday feature from June 19, 1923 to June 2, 1991.  Syndicated by the Chicago Tribune/New York News Syndicate, the strip depicts the lives of diverse lowbrow characters who reside at the Schmaltz (later Plushbottom) boarding house.  The central character, Moon (short for Moonshine), is a would-be prizefighter—perpetually strapped for cash but with a roguish appetite for vice and high living.  Moon took a room in the boarding house at 1323 Wump Street in 1924 and never left, staying on for 67 years.

Hey Arnold!: Hey Arnold!  is an American animated television series created by Craig Bartlett that aired on Nickelodeon from October 7, 1996 to June 8, 2004.  The show centers on a fourth grader named Arnold, who lives with his grandparents in an inner-city boarding house.  Episodes center on his experiences navigating big city life while dealing with the problems he and his friends encounter.

Yount's Woolen Mill and Boarding House: Yount's Woolen Mill and Boarding House is a historic woolen mill and boarding house located in Ripley Township, Montgomery County, Indiana.  The boarding house was built in 1851, and is a two-story, "L"-shaped, Late Federal style brick building.  It has a gable-on-hip roof and two-story porch on the rear side.  The mill was built in 1864, and is a 2 1/2-story brick building on a raised basement with Greek Revival style design elements.  Also on the property are the remains of an 1849 frame mill, an 1867 brick building, dam and mill race.  The Yount Mill was contracted by the U.S. Government to manufacture Army uniforms during both the American Civil War and Spanish–American War.

John Y. Hill: John Y. Hill (August 14, 1799 - August 2, 1859) was an American builder, tailor, bricklayer, cattle herder, hotel operator, and state legislator in Kentucky.  He was born in Shepherds Town, Virginia in 1799 and moved to Elizabethtown, Hardin County, Kentucky, in approximately 1818.  He worked as a tailor from approximately 1818 and into the 1830s.  He also worked as a bricklayer and builder from 1825 and into the 1840s.  He also served in the Kentucky House of Representatives.  In approximately 1825, he built the Hill House (later known as Brown Pusey House), a Federal-style building in Elizabethtown.  In the 1840s, he began operating Hill House as a boarding house.  Hill died of pneumonia in August 1859.  His second wife, Rebecca Davis Stone Hill, continued to operate Hill House (sometimes referred to during her operation as "Aunt Beck Hill's Boarding House") until she died in 1882.  General George Armstrong Custer lived at the house from 1871 to 1873.

Cottage in the Pines: Cottage in the Pines, also known as Pine Park Cottage and Dunwald Farm, is a national historic district located at Rio in Orange County, New York.  The district includes: a large three-story boarding house (c. 1895); a mill and weir (c. 1900); a large woodshop; mill pond; two smaller workshops; a machine shop (c. 1936); bungalow; and several small sheds.  The boarding house is a three-story, L-shaped frame building.  It features a full width front porch and fishscale shingles.  The property reflects the once popular recreational boarding house culture.

Christopher Castile: Christopher Jon Castile (born June 15, 1980) is a former American actor.  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! ".

ZJ Boarding House: ZJ Boarding House (ZJBH) is a surfboard, skateboard, snowboard, and clothing store Located in Santa Monica, California, United States.  For over twenty years ZJ Boarding House has provided not only an outlet for the consumer to purchase board sport equipment, but has impacted the local community in several positive ways.  From a small surf shop to becoming a super store for board sports, ZJ Boarding House helps the community, youth, and has expanded to include joint Hurley and Billabong storefronts.

Brann Boardinghouse: The Brann Boardinghouse is a historic boarding house located on Bryan Street in Tonopah, Nevada.  The 2 ⁄ -story building is the largest wood-frame residence in Tonopah.  The building's design includes a two-story porch with a balustrade along the second floor, molded cornices, boxed eaves, and a hipped roof; the inside has 18 rooms connected by two central halllways, one on each floor.  Mrs. A.J. Brann built the boarding house in 1906.  It was one of many boarding houses built in Tonopah to house the community's miners.  The house is now one of only four boarding houses remaining in Tonopah.

W C A Boarding House: The W C A Boarding House is a historic boarding house at 19 Bliss Street in Springfield, Massachusetts.  It is one Springfield's few surviving boarding house structures from the 19th century.  It was built in 1884 by the Women's Christian Association (WCA), a social welfare organization that was a predecessor to the Young Women's Christian Association.  The three story brick structure was used by the WCA as a space for boarding respectable working class single women.  With the construction of a new facility in 1910, the property was operated as a private boarding house.  Since 1962 the building has house the Springfield Rescue Mission, a social welfare agency.

Supporting paragraphs: Christopher Castile Hey Arnold!
Answer: Hey Arnold!