Polka Dot Door was a long-running Canadian children's television series produced by the Ontario Education Communications Authority from 1971–1993. PDD was created and developed by a team of employees from TVOntario hired and led by original series producer-director, Peggy Liptrott.

Significant contributors to the creation and development of the series in 1971 included Executive Producer Dr. Vera Good who laid the conceptual foundation of the show, Educational Supervisor, Marnie Patrick Roberts, Educational Consultant L. Ted Coneybeare, Script Writers/Composers, Pat Patterson and Dodi Robb, Animator Dick Derhodge and Dr. Ada Scherman, a professor at the prestigious Institute of Child Study in Toronto who was consulted in the early stages of PDD's development and is responsible for giving the show its name.