Treadwell-Collins sought permission from Carrington's father before agreeing to make Bobby the murderer and told Mark Jefferies of the "Daily Mirror" that if he had objected to the story, he planned to recast the character again. He informed Carrington of the twist on the evening of 16 February 2015, three days before the live reveal, to gauge a response. Carrington was pleased with the twist and thought it made sense for Jane to hide Bobby's secret. Treadwell-Collins praised Carrington, calling him "a very intelligent little boy and very emotionally mature". Bywater, who portrays Lucy, was surprised by the twist, having discovered during rehearsals on the morning of the episode.