Grey's Anatomy Season 4 Episode 7“Physical Attraction... Chemical Reaction”

ABC · S4E7 · Aired November 8, 2007 · 60 min · ★ 8.7/10

George and Izzie's romantic chemistry is put to the test, Mark develops a crush on a fellow surgeon, and Callie's role as Chief Resident is in jeopardy.

Next new episode: S23 E5 “Stronger (What Doesn't Kill You)” — November 12, 2026

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