CREATE TABLE table_23528223_2 (no_in_series VARCHAR2, directed_by VARCHAR2)

What's the series number of the episode directed by Skipp Sudduth?
SELECT no_in_series FROM table_23528223_2 WHERE directed_by = "Skipp Sudduth"
SELECT "no_in_series" FROM "table_23528223_2" WHERE "Skipp Sudduth" = "directed_by"