On 15 August 2011, the BBC released a short "prequel" to "Let's Kill Hitler", written by Steven Moffat. In the prequel, Amy calls the Eleventh Doctor and leaves a message for the Doctor on the TARDIS's answer phone, begging him to find her child, Melody. Though Amy knows Melody will grow up to be River Song, she does not want to miss seeing her grow up. As she ends her message, it is revealed that a very upset Doctor was listening but did not pick up the phone, even though Amy had pleaded for him to.