Plot summary
The team prepares for Self's attack. They capture Self, who convinces them to let him sell Scylla and the Company will be destroyed anyway. They let him leave, while Sucre hides in his trunk. Self and Gretchen arrive in a motel and Sucre informs the others, who arrive and attack the duo. Scofield's condition makes him collapse; and the duo escape. The Company recovers Scofield. Having put a camera in the warehouse, Self finds where Scofield has hidden the piece and obtains it before calling the conduit. Meanwhile, Bagwell is visited by a man pretending to be a bible salesman.
The former finally decides to let Rita and Emily escape and is captured by the man, who is a Company man in fact. Self meets and kills the conduit in order to keep the whole money. Mahone meets FBI agents Lang and Wheeler, who can grant the team immunity in exchange for Scylla. The latter arrests the former after hearing that Scylla is gone. Tabak resigns from the Company. Burrows makes a deal with Krantz to return Scylla in exchange for Scofield's surgery.
Credits
Adapted from Wikipedia contributors, Prison Break season 4. HTML formatting and reference markers removed.