About

"Lucky Day" is the fourth episode of the fifteenth series of the British science-fiction television series Doctor Who. It was written by Pete McTighe, and was directed by Peter Hoar. The episode was released on BBC iPlayer, BBC One and Disney+ on 3 May 2025. It features the return of companion Ruby Sunday, who plays a leading role in the episode opposite Conrad Clark, with both the Fifteenth Doctor and Belinda Chandra, the series' main leads, only appearing briefly. The episode focuses on Ruby, who begins a relationship with podcaster Conrad Clark as she attempts to find her place in the world after leaving the Doctor. When Conrad's true aim to turn the public against military organisation UNIT is revealed, Ruby and Kate Lethbridge-Stewart have to deal with the repercussions of Conrad's actions.