Table schema:
CREATE TABLE table_24132083_1 (original_air_date VARCHAR, directed_by VARCHAR, written_by VARCHAR)

Question: On how many different dates did the episode directed by Marcos Siega and written by Scott Buck air for the first time?
SQL: SELECT COUNT(original_air_date) FROM table_24132083_1 WHERE directed_by = "Marcos Siega" AND written_by = "Scott Buck"