Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_2468961_7 (no_in_series INTEGER, no_in_season VARCHAR)
### Question:
When 15 is the number in season what is the highest number in series?
### Answer:
SELECT MAX(no_in_series) FROM table_2468961_7 WHERE no_in_season = 15