What date did the episode air that had a ranking of 17 for cable?
CREATE TABLE table_24399615_4 (airdate VARCHAR, cable_rank VARCHAR)
SELECT airdate FROM table_24399615_4 WHERE cable_rank = "17"
### Context: CREATE TABLE table_24399615_4 (airdate VARCHAR, cable_rank VARCHAR) ### Question: What date did the episode air that had a ranking of 17 for cable? ### Answer: SELECT airdate FROM table_24399615_4 WHERE cable_rank = "17"