In the finale, Peter races to stop the Order of Moriah from destroying the Temple Mount and bringing about the End of Days; a trapped Lynn takes matters into her own hands; and Billingham faces a flaw in his plan. In other events; Peter uncovers all the answers in the Emma Wilson case.
An ancient religious sect is ready to enact its plan; Peter partners with unlikely allies; Lynn realizes the depth of the conspiracy while investigating Ridell; Golan tries to crack more clues from the Donaldson case; and Avram moves to protect his valuable asset.
Peter turns to Golan for help after a breakthrough in the Emma Wilson case; Ridell pressures Lynn to get Peter out of the country; and Debbie has to make a dangerous trade with Tad Billingham if she hopes to avoid bloodshed. In other events, Rabbi Lev and a new partner head to the underground tunnels to carry out their mission.
Peter searches for the murderer while also pursuing Yussef Khalid; and forms an uneasy alliance with Det. Golan Cohen while dealing with an unexpected revelation. In other events, Avram begins his journey to Israel with the red heifer; and Billingham and his disciplines prepare Josh for a life-changing event.