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, U.S. viewers (million), Original air date
###Question: How many episodes in the season had 3.81 million US viewers?
gpt
SELECT COUNT No. in season FROM table WHERE U.S. viewers (million) = 3.81