 On 6 January 2018, a 16-second trailer for the episode was released, and a 42-second clip from the episode was released six days later.The episode premiered on BBC One on 13 January 2018 and was available to watch on BBC iPlayer for thirty days after its broadcast.In its original broadcast, the episode received a seven day rating of 4.93 million viewers, which is an increase of 240,000 viewers from the previous episode.