Question: In which American animated educational interactive children's television program,  created and executive produced by Chris Gifford and Valerie Walsh, did Harrison Chad have a role?
Sentence (from "Dora the Explorer"): A Spanish-dubbed version first aired as part of a "Nick en español" block on NBC Universal-owned Telemundo through September 2006; since April 2008, this version of the program has been carried on Univision as part of the "Planeta U" block.
Relevant evidence: No