His father, also named Roy Halee, provided the singing voice for Mighty Mouse in late 1940s Terrytoons cartoons, as well as the voices of Heckle and Jeckle from 1951 through 1961.
Bob Kuwahara (1901-1964), Japanese-American animator for Walt Disney and Terrytoons
Created by Gene Deitch under the Terrytoons studio (which by that time was a subsidiary of CBS, the network that broadcast Captain Kangaroo), Tom Terrific ran in a series of five-minute cartoons created specifically for the Captain Kangaroo show from 1957-1959, and was rerun on Kangaroo for years thereafter.