CREATE TABLE table_23476 ("#" FLOAT, "Title" CLOB, "Maneater" CLOB, "Television Premiere" CLOB, "DVD release" CLOB, "Writer" CLOB, "Director" CLOB, "Producer" CLOB)

When was the dvd release directed by Billy O'Brien?
SELECT "DVD release" FROM table_23476 WHERE "Director" = 'Billy O''Brien'
SELECT "DVD release" FROM "table_23476" WHERE "Director" = 'Billy O''Brien'