CREATE TABLE table_1864 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original air date" CLOB, "Production code" FLOAT)

When joan tewkesbury is the director what is the number in seasons?
SELECT "No. in season" FROM table_1864 WHERE "Directed by" = 'Joan Tewkesbury'
SELECT "No. in season" FROM "table_1864" WHERE "Directed by" = 'Joan Tewkesbury'