S06E04Grey's Anatomy season 6 episode 4: Tainted Obligation
Aired 8 October 200943 minRated TV-14
Where to watch Grey's Anatomy Season 6 in Australia
Grey's Anatomy season 6 is streaming in Australia on Disney+ (subscription, listed for the whole show).
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Availability checked 16 November 2026.
What happens in “Tainted Obligation”
When Meredith and Lexie's father, Thatcher, returns to the hospital with a failed liver, it's up to Meredith to save his life. Meanwhile, Izzie empathizes with a patient riddled with tumors, as Mark, annoyed with Cristina's competitive zeal, tricks her into assisting on an unusual surgery.
Episode summary: TMDB.
Before you watch
- It is episode 3 of 22 of season 6, so watch episodes 1 to 3 first.
- It runs about 43 minutes.
- Directed by Tom Verica, written by Jenna Bans.
- TMDB users rate it 7.9 out of 10 (13 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
- Tom Verica
- Writer
- Jenna Bans
- Guest stars
- Jeff Perry as Thatcher GreyMark Saul as SteveTom Amandes as Tom WallerIsabella Hofmann as Irene WallerPhil Abrams as Dr. NelsonPayton Silver as Dr. KnoxRalph Waite as Irving WallerJocko Sims as Randy Helsby
Credits: TMDB.
More from Grey's Anatomy Season 6
Previous · S06E03I Always Feel Like Somebody's Watchin' Me1 October 2009
Next · S06E05Invasion15 October 2009Every episode of Season 6Grey'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.