While the gang continues to match wits and blows with Self and Gretchen for control of Scylla (and with the Company in hot pursuit), Mahone enlists the aid of former FBI colleagues Lang and Wheeler (Barbara Eve Harris, Jason Davis). Meanwhile, Sara raises the dosage of the drug she's giving Michael to counter the effects of his brain tumor, and T-Bag continues to hold Gretchen's daughter and sister prisoner. But T-Bag tells Gretchen's sister: "I'm as much a prisoner as you."

"Just Business"