Prison Break Season 4

Season 4 starts with Michael avenging Sara's death, before learning that Gretchen did not kill her as he thought. Michael also learns the truth about Whistler, that he has secretly been working alongside Mahone to take down the Company. A Company operative takes Whistler's life shortly after this. Sona has burned down and Sucre, Bellick, and T-Bag have escaped during the chaos.

After returning to Chicago to look for Sara, Michael is

arrested and recruited by Don Self (Michael Rapaport), a Department of Homeland Security agent, to help bring down the Company in exchange for his freedom. Lincoln, who was arrested in Panama is transferred to Chicago, and along with Mahone, Sucre, and Bellick with whom a deal is made. Also joining the group are Sara, who escaped from Gretchen which resulted in Gretchen's own captivity by the Company, having failed to secure a valuable item, and Roland (James Hiroyuki Liao), a hacker who was assigned to help them after getting arrested for identity theft. Together, they devise a plan to retrieve Scylla, thought of as the Company's 'little black book', from the Company that will help to destroy them. In the meantime, Wyatt (Cress Williams), an agent from the Company, attempts to track Michael and Lincoln down and T-Bag heads North to the US with the "Birds" book in his possession.

Michael also begins to experience some troubling health problems. While reaching near to SCYLLA, Brad Bellick sacrifices his life in order to let the other members of the team to reach SCYLLA. The general discovers that Gretchen is not on his side anymore but does not kill her for the sake of their daughter Emilly. Now Michael is supposed to go under a surgery or he may die soon, and T-Bag is getting impatient to get the money that he is supposed to get in exchange of scylla. Sucre is shot once and is saved because of Sara, who performs a surgery on him immediately.