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_1776943_1 (broadcast_date VARCHAR, viewers__in_millions_ VARCHAR, archive VARCHAR)
  ### Question:
  Name the broadcast date for 6.4 million viewers for the archive of 16mm t/r
  ### Answer:
  SELECT broadcast_date FROM table_1776943_1 WHERE viewers__in_millions_ = "6.4" AND archive = "16mm t/r"