text: Mighty Mouse Playhouse Mighty Mouse had little theatrical impact, but became Terrytoons' most popular character and a cultural icon on television. In 1955, Paul Terry sold the Terrytoons studio to CBS, which repackaged the theatrical cartoons as a popular Saturday morning show, Mighty Mouse Playhouse. The show aired from December 1955 through September 1967, using the existing film library. Only three new cartoons were produced after the sale. The final season also included a new feature, entitled The Mighty Heroes.
  Tom Morrison of Terrytoons provided the speaking voice of Mighty Mouse in the show's new framing sequences.
  The show's theme song was credited on some early records to "The Terrytooners, Mitch Miller and Orchestra". However, writer Mark Evanier credits a group called The Sandpipers (not the 1960s easy listening group of the same name).
  The New Adventures of Mighty Mouse and Heckle & Jeckle
  In 1979–1980, Filmation made television cartoons starring Mighty Mouse and fellow Terrytoon characters Heckle and Jeckle in a show called The New Adventures of Mighty Mouse and Heckle & Jeckle. The show introduced two new characters: a vampire duck named Quacula (not to be confused with Count Duckula), and Oil Can Harry's bumbling, large, but swift-running, henchman Swifty. The show premiered in 1979 and lasted two seasons. In the Filmation series and movie, Mighty Mouse and Oil Can Harry were performed by veteran voice artist Alan Oppenheimer, and Pearl Pureheart was voiced by Diane Pershing. Frank Welker played Heckle, Jeckle and Quacula, and Norm Prescott played Theodore H. Bear.