Table: episodes_table_13
Columns: episode_no_episode_no_refers_to_the_episodes_number_in_the_overall_series_whereas_series_no_refers_to_the_episodes_number_in_this_particular_series
series_no
episode
director
writer
original_airdate

Question: Name the original airdate for robin mukherjee and margy kinmonth
SQL: SELECT "original_airdate" FROM episodes_table_13 WHERE "writer" = 'Robin Mukherjee' AND "director" = 'Margy Kinmonth'

Question: Name the least series number for episode number being 78
SQL: SELECT MIN("series_no") FROM episodes_table_13 WHERE "episode_no_episode_no_refers_to_the_episodes_number_in_the_overall_series_whereas_series_no_refers_to_the_episodes_number_in_this_particular_series" = 78