CREATE TABLE table_15185133_1 (no_in_season VARCHAR(255), written_by VARCHAR(255), directed_by VARCHAR(255))
What season has an episode written by john o'bryan and directed by ethan spaulding?
    
SQL: SELECT no_in_season FROM table_15185133_1 WHERE written_by = "John O'Bryan" AND directed_by = "Ethan Spaulding"