Reunited with his sister, Oliver and Thea find themselves searching through a familiar maze of catacombs. Meanwhile, John and Lyla partner on a special ops mission.

Aiden Stoxx, Andrea Sixtos, Audrey Marie Anderson, Charlie Barnett, Josh Pyman, Kyra Zagorsky, Lexa Doig, Malaika Jackson, Shafin Karim, Willa Holland