Table: doctor_who_episodes
Columns: no_overall
no_for_series
title
directed_by
written_by
original_air_date
uk_viewers_million

Question: What dat did "The changeling" originally air?
SQL: SELECT "original_air_date" FROM doctor_who_episodes WHERE "title" = '"The Changeling"'

Question: What date did "the eye of the phoenix" originally air?
SQL: SELECT "original_air_date" FROM doctor_who_episodes WHERE "title" = '"The Eye of the Phoenix"'

Question: What episode number of the series is "the coming of arthur (part 1)"?
SQL: SELECT "no_for_series" FROM doctor_who_episodes WHERE "title" = '"The Coming of Arthur (Part 1)"'