human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: No. in series, No. in season, Title, Directed by, Written by, Original air date, U.S. viewers (million)
###Question: who directed the episode that have 0.25 million u.s viewers
gpt
SELECT Directed by FROM table WHERE U.S. viewers (million) = 0.25