CREATE TABLE table_20076 ("No. in season" FLOAT, "No. disc" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT)

How many original air dates were there for episode 17?
SELECT COUNT("Original air date") FROM table_20076 WHERE "No. in season" = '17'
SELECT COUNT("Original air date") FROM "table_20076" WHERE "No. in season" = '17'