Right My Fire - S1.E7

Michael's old school friend Johnny is released from jail but quickly becomes terrorized by his neighbors. Sean and Michael investigate the threats and the clues lead them to Ray O'Grady, who is badly scarred from a mysterious fire that occurred several years ago.

Sean catches his brother Patrick speaking intimately with the widow of one of his colleagues. Patrick claims the relationship is merely platonic but Sean nevertheless wants Patrick to tell Carolyn about it.