CREATE TABLE table_64453 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT)

Which episode was the last written by chris hawkshaw this season?
SELECT MAX("No. in season") FROM table_64453 WHERE "Written by" = 'chris hawkshaw'
SELECT MAX("No. in season") FROM "table_64453" WHERE "Written by" = 'chris hawkshaw'