Grey's Anatomy/The Heart of the Matter

The Heart of the Matter
Season 4, Episode 4
Airdate	October 18, 2007
Production Number	40465
Written by	Allan Heinberg
Directed by	Randy Zisk
← 4x03 Let the Truth Sting	4x05 → Haunt You Every Day
Grey's Anatomy — Season Four

This article about an episode needs to be expanded with more information. Please help out by editing it.

The Heart of the Matter is the fourth episode of the fourth season of Grey's Anatomy, and the sixty-fifth episode overall.

Starring: Ellen Pompeo (Meredith), Sandra Oh (Cristina), Katherine Heigl (Izzie), Justin Chambers (Alex), T.R. Knight (George), Chandra Wilson (Miranda), James Pickens, Jr. (Richard), Sara Ramirez (Callie), Eric Dane (Mark), Chyler Leigh (Lexie), Patrick Dempsey (Derek)

Guest Starring: (in credits order) Edward Herrmann (Dr. Norman Shales), Michael McGrady (Stanley Singer), Matt Lanter (Adam Singer), Maggie Siff (Ruthie Sales), Miriam Flynn (Gretchen Bitzer), Camille Winbush (Camille Travis), Ron Melendez (Will), Loretta Devine (Adele Webber), Shelley Robertson (Arlene Travis), Jeremy Rabb (ER Resident), Maile Flanagan (Lab Tech), Tymberlee Chanel (Intern Claire), Gloria Garayua (Intern Graciella), Richard Keith (Intern Mitch), Molly Kidder (Intern Megan), Joy Osmanski (Intern Lucy), Mark Saul (Intern Steve), Winston Story (Intern Leo), Cassandra Braden (Housekeeping Staffer), Nicole Cummins-Rubio (Paramedic)