Sarah Gavin on Day 4
|Portrayed by||Lana Parrilla|
|First appearance||Day 4: 7:00 AM – 7:00 AM|
|Last appearance||Day 4: 7:00 PM – 8:00 PM|
 Day 4
We first met Sarah Gavin at the beginning of Day 4. She was a new intelligence analyst. CTU Director, Erin Driscoll, asked Sarah to spy on Chloe O'Brian because she believes she is helping Jack Bauer. Sarah confirmed Driscoll's suspicions and Chloe is led away.
Later, a mole working within CTU, Marianne Taylor, plants evidence that causes Sarah to be identified as the mole. Driscoll has her taken into custody and promptly tortured. We saw several scenes of Sarah in pain. Since Edgar Stiles is suspicious of Marianne and doesn't believe Sarah was the mole, he finds a way that proves Marianne was the mole and planted evidence of Sarah's computer. After Sarah was released, she demanded a pay raise from Driscoll for what she went through. However, Erin later resigns after her daughter's suicide and Michelle Dessler is given command of CTU. While CTU is working hard during a national threat, Sarah selfishly asks Michelle about the pay rise. Michelle fires her on the spot.
Lana Parrilla was first a recurring guest star in the beginning of Season 4. She was promoted to a main cast member in episode "Day 4: 1:00 PM – 2:00 PM". She only appeared in 12 episodes of that season.
- She is one of two actors to be promoted to the main cast after being a guest star in the same season. The other is Roger Cross, who played Curtis Manning.