Her death was faked early in the third season, apparently beheaded by Gretchen Morgan, and her "head" was delivered in a box to Lincoln Burrows. In season 4 it is discovered that the head was a ploy and that Sara is alive.

Is Sara in Season 5 of Prison Break?

On March 9, 2016, Sarah Wayne Callies was confirmed to be returning as Sara Tancredi. ... On March 21, 2016, Paul Adelstein was confirmed to be reprising his role as Paul Kellerman.

Does Sarah die in prison?

Sara's death is revealed to be fake, and she is actually still alive. ... After Bruce bails out Michael and Lincoln, he brings them to the place where Sara has been hiding since her escape. She and Michael reunite joyfully.