Chinese Algebra

S4 E11: As Ray devises another attempt to save Avi and settle his debts to the mob, FBI agent Frank Barnes detains him before he can execute his plan, forcing Ray to send Mickey to Vegas to place a high-stakes bet on the boxing match between Hector and Whittaker. Barnes offers Ray a chance to turn informant against Dmitri in exchange for protection, leading him to question whether he's turning into his father.