Christopher Patrick Chung is an Australian actor and singer. He first gained prominence when he appeared in series 9 of Waterloo Road on BBC One. More recently, he is known for his role as Roddy Ho in the Apple TV+ series Slow Horses. From Wikipedia
The BBC and Disney+ confirm the return of Ncuti Gatwa as the Doctor, joined by new companion Belinda Chandra and a unique animated antagonist voiced by Alan Cumming.
