Negotiations broke down. In a 2015 interview with The Hollywood Reporter , Callies stated: "I was fired for wanting to be with my family. I didn't quit… I was told I was no longer needed."
The episode opens with Michael imprisoned in the hellish Sona prison in Panama. Lincoln hands him a box, claiming it was found on the boat where Sara was last seen. When Michael opens it, he finds the grisly contents: the severed head of Dr. Sara Tancredi. did sara die in prison break
But how do you bring back a character whose severed head was in a box? The answer was a classic Prison Break hand-wave. Negotiations broke down