1) Casebook 2: Despair in Monterey Bay (based on Season 4, Episode 2) Casebook 3: The Case of the Willing Parrot (based on Season 2, Episode 1) Casebook 4: The Map With a Gap (based on Season 2, Episode 6) Casebook 5: The Case of the Mystery Weekend (based on Season 5, Episode 1) Casebook 6: The Case of the Smart Dummy (based on Season 5, Episode 6) Episodes Season 1 (1987) All episodes this season were directed by Charles S. Dubin. Season 2 (1988) Season 3 (1990) Season 4 (1991) Season 5 (1992) References External links Mathnet - To Cogitate and to Solve (episode guide, photos, sound clips, and actor bios) Square One Television Dragnet (franchise) Mathematics education television series American children's education television series American parody television series Fictional portrayals of the Los Angeles Police Department Fictional portrayals of the New York City Police Department Television shows set in Los Angeles Television shows set in New York City 1987 American television series debuts Television series by Sesame Workshop 1980s American children's television series 1990s American children's television series 1992 American television series endings