S05E04Grey's Anatomy season 5 episode 4: Brave New World
Aired 16 October 200843 minRated TV-14
Where to watch Grey's Anatomy Season 5 in Australia
Grey's Anatomy season 5 is streaming in Australia on Disney+ (subscription, listed for the whole show).
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From $9.99/mth
Availability checked 16 November 2026.
What happens in “Brave New World”
Meredith is sent into a state of panic when Derek finds her mother's diary in the house. Meanwhile, Callie stresses while preparing for her first date with Erica. Later, Cristina stumbles across a part of the hospital no one has ever seen before.
Episode summary: TMDB.
Before you watch
- It is episode 4 of 24 of season 5, so watch episodes 1 to 3 first.
- It runs about 43 minutes.
- Directed by Eric Stoltz, written by Debora Cahn.
- TMDB users rate it 8.1 out of 10 (16 votes).
Grey's Anatomy trailer
The official trailer for the series (no preview of this episode has been published).
Play video: Grey's Anatomy trailer
Cast and crew of this episode
- Director
- Eric Stoltz
- Writer
- Debora Cahn
- Guest stars
- Brooke Smith as Erica HahnSteven W. Bailey as JoeGloria Garayua as Intern GraciellaMark Saul as SteveAmy Aquino as Marianne GrandyBre Blair as Lauren PaileyMax Burkholder as Duncan PaileyCandice Afia as Intern Laura
Credits: TMDB.
More from Grey's Anatomy Season 5
Previous · S05E03Here Comes the Flood9 October 2008
Next · S05E05There's No 'I' in Team23 October 2008Every episode of Season 5Grey's Anatomy episode guide
Episode names, air dates, runtimes, stills and ratings: TMDB. Air dates are the first broadcast anywhere; where it streams is our daily Australian check.