Ruby Sunday faces life back on earth without the Doctor. But when a dangerous new threat emerges, can Ruby and UNIT save her new boyfriend, Conrad, from the terrifying Shreek?

Cast: Ncuti Gatwa, Varada Sethu, Millie Gibson, Jemma Redgrave, Ruth Madeley, Anita Dobson, Angela Wynter, Michelle Greenidge, Alexander Devrient, Aidan Cook, Nicholas Briggs, Faye McKeever