CREATE TABLE table_21304131_2 (survivor_count VARCHAR, directed_by VARCHAR)

What was the survivor count for the episode directed by Gwyneth Horder-Payton?
SELECT survivor_count FROM table_21304131_2 WHERE directed_by = "Gwyneth Horder-Payton"
SELECT "survivor_count" FROM "table_21304131_2" WHERE "Gwyneth Horder-Payton" = "directed_by"