text: 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_name_51 (doctor_who_episode VARCHAR, original_airdate__uk_ VARCHAR)
  ### Question:
  Which Doctor Who episode has a Original airdate (UK) of dvd only?
  ### Answer:
  SELECT doctor_who_episode FROM table_name_51 WHERE original_airdate__uk_ = "dvd only"