The Season 4 premiere revealed that Sara had actually escaped from Gretchen's custody. The explanation for the previous season's evidence was that:
After escaping her captors, she fled to Chicago and was kept safe by her father’s former aide, Bruce Bennett. Why Was She "Killed" in the First Place? prison break is sara really dead
Gretchen used a lookalike cadaver's head to maintain leverage over Michael and Lincoln. The Season 4 premiere revealed that Sara had
The decision to kill Sara was primarily driven by real-world factors rather than purely creative ones: prison break is sara really dead
No, Dr. Sara Tancredi is . Although she was seemingly killed off in one of the show's most shocking moments, her "death" was later revealed to be a elaborate fake-out. The Infamous "Head in a Box"