CREATE TABLE table_22325 ("No." FLOAT, "#" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Canadian air date" TEXT, "U.S. air date" TEXT, "Production code" FLOAT, "Canadian viewers  ( million ) " TEXT)

How many air dates where directed by jim donovan?
SELECT COUNT("U.S. air date") FROM table_22325 WHERE "Directed by" = 'Jim Donovan'
SELECT COUNT("U.S. air date") FROM "table_22325" WHERE "Directed by" = 'Jim Donovan'