When Amy Taylor is admitted to the hospital accompanied by her sister, Gretchen, with signs of premature heart disease, Dr. Sam Griffith discovers a deeper medical mystery. Also, Griff anxiously awaits the results of his MRI, hoping to get to the root of his troubling symptoms.
| Name | Type | Role | |
|---|---|---|---|
| Jeremy Svenson | Writer | ||
| Hilarie Burton | Guest Star | Gretchen | |
| Bethany Joy Lenz | Guest Star | Amy Taylor | |
| Oz Scott | Director |