CREATE TABLE table_22576 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original air date" CLOB, "Production code" CLOB)

How many series were directed by Rob Renzetti?
SELECT COUNT("No. in series") FROM table_22576 WHERE "Directed by" = 'Rob Renzetti'
SELECT COUNT("No. in series") FROM "table_22576" WHERE "Directed by" = 'Rob Renzetti'