<Tr> <Td_colspan="8"> Max lies in a coma following Jonathan's attack and the Institute is put on lockdown when it becomes clear Jonathan is inside . Magnus and Luke meet with the Seelie Queen, who proposes a Downworlder alliance against Valentine, even if it means starting a war with the Shadowhunters . Luke refuses immediately while Magnus is given time to decide . Jonathan steals the Mortal Mirror . Magnus chooses to serve his people over his relationship with Alec and breaks up with him . Clary discovers Sebastian is Jonathan when he fails a test and manages to get the Mirror back before he escapes the Institute . However, her attempt to disarm the Mirror destroys it, and she realizes the real Mirror is Lake Lyn in Idris . </Td> </Tr> <Tr> <Th> 32 </Th> <Td> 19 </Td> <Td> "Hail and Farewell" </Td> <Td> Matt Hastings </Td> <Td> Bryan Q. Miller </Td> <Td> August 7, 2017 (2017 - 08 - 07) </Td> <Td> 267314 - 32 </Td> <Td> 0.60 </Td> </Tr> <Tr> <Td_colspan="8"> Isabelle, Jace and Clary are trying to take out Valentine and Jonathan but get attacked by a possessing demon . Jace kills the demon . Clary tells the Inquisitor that the Mortal Mirror is Lake Lyn in Idris . The Seelie Queen comes to the institute to meet with the Downworld Council but she refuses to give her support to capture and execute Valentine . Maia and Simon are dating . </Td> </Tr> <Tr> <Th> 33 </Th> <Td> 20 </Td> <Td> "Beside Still Water" </Td> <Td> Matt Hastings </Td> <Td> Todd Slavkin & Darren Swimmer </Td> <Td> August 14, 2017 (2017 - 08 - 14) </Td> <Td> 267314 - 33 </Td> <Td> 0.59 </Td> </Tr>

How many episodes in season 2b of shadowhunters