This article covers a real-world subject which should not be taken as part of the Holby universe.
"Brave New World" is the 848th episode of Casualty and the 25th episode of the 27th series.
Synopsis[]
Big Mac thinks he may have finally found the woman of his dreams, and when she mistakes him for a doctor he fails to set her straight. Meanwhile, Ash clashes with Zoe by carrying out a risky procedure without her knowledge.