CREATE TABLE table_20806 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" TEXT)

Who wrote the episode with the production code of 942A?
SELECT "Written by" FROM table_20806 WHERE "Production code" = '942A'
SELECT "Written by" FROM "table_20806" WHERE "Production code" = '942A'