<Tr> <Td_colspan="8"> The fallout from a deadly routine call causes a rift between Shay and Dawson . The men of 51 are on alert for a mole in the firehouse . Meanwhile, Severide goes stealth in his pursuit of Hadley . Dawson gets some shocking news about one of Arthur's henchmen Jay . </Td> </Tr> <Tr> <Th> 29 </Th> <Td> 5 </Td> <Td> "A Power Move" </Td> <Td> Jann Turner </Td> <Td> Andi Bushell </Td> <Td> October 22, 2013 (2013 - 10 - 22) </Td> <Td> 205 </Td> <Td> 7.45 </Td> </Tr> <Tr> <Td_colspan="8"> Pressure is on Boden to resign from the firehouse . The mole is revealed and the men form a plan to run him out of the house . Arthur the thug continues to cause trouble at Molly's . </Td> </Tr> <Tr> <Th> 30 </Th> <Td> 6 </Td> <Td> "Joyriding" </Td> <Td> Steve Shill </Td> <Td> Derek Haas & Tim Talbott </Td> <Td> November 12, 2013 (2013 - 11 - 12) </Td> <Td> 206 </Td> <Td> 7.66 </Td> </Tr>

What episode do dawson and casey get together