Table schema:
CREATE TABLE table_13956521_2 (original_airdate VARCHAR, writer_s_ VARCHAR, director VARCHAR)

Question:  how many original airdate with writer(s) being becky hartman edwards and director being adam nimoy
SQL: SELECT COUNT(original_airdate) FROM table_13956521_2 WHERE writer_s_ = "Becky Hartman Edwards" AND director = "Adam Nimoy"