Episode: Season 10, Episode 2
What happens: Sweet and chipper, Heather lasts about a season on the series until the Grim Reaper comes knocking at her door. Portrayed by Tina Majorino from Veronica Mars, she is part of a new cohort of interns in season nine, becoming Derek's mentee. During the storm in the season nine finale, Heather looks for Richard in the generator room. When she finds the surgeon suffering from electrical shock, she steps into a puddle and gets electrocuted herself, then hits her head on the generator box. Derek gets her brain bleed, but she eventually dies from a swollen brain at the beginning of season 10.