The music heard on the Stormgrens' radio is all from the 1950s, the decade when the novel Childhoods End was published.
The piece of music played at the end is Ralph Vaughn William's "The Lark Ascending".
Many previous unsuccessful attempts to produce a film or TV series based on the novel were made over the decades since its publication. Stanley Kubrick approached novelist Arthur C. Clarke with thought to adapting the novel in the 1960s. Unfortunately, the rights were elsewhere at the time and the pair went on to do 2001: A Space Odyssey (1968) instead. Abraham Polonsky and Howard Koch bought unmade screenplays while Philip DeGuere scripted it as TV miniseries in the late 1970s. In the early 2000s, plans were made for a film to be directed by Kimberly Peirce.
Broadcast in 2015, sixty-two years after Arthur C. Clarke's original novel was published.
In the series, Yael Stone plays a devout Christian who struggles with her faith. In real life, Stone is an Atheist.