CREATE TABLE table_24026 ("Ep." FLOAT, "Season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Prod. Code" TEXT)

What is the production code of the episode written by Jack Carrerrow?
SELECT "Prod. Code" FROM table_24026 WHERE "Written by" = 'Jack Carrerrow'
SELECT "Prod. Code" FROM "table_24026" WHERE "Written by" = 'Jack Carrerrow'