Warrior Nun - 2 Corinthians 10:4

Finally, the heist episode. The season's penultimate episode features Ava (Alba Baptista), Beatrice (Kristina Tonteri-Young), Mary (Toya Turner), Camila (Olivia Delcán), and Father Vincent (Tristán Ulloa) using the conclave as cover to break into the catacombs under the Vatican. Not altogether unexpected, Sister Crimson (Sinead MacInnes) and the other nuns await the former sisters. Having accepted her role as a member of the team, Ava leads the group underground while relying on them to keep her safe and conserve the Halo's power for what is to come. A joyful mix of stealth, action, and really bad puns, "Corinthians 10:4" ends with Ava entering the tomb to discover the last thing she ever expected.

Although nearly the entire episode is centered around Ava and the heist under the Vatican, the episode does include a B-story involving Jillian Salvius (Thekla Reuten) making a discovery about Lilith (Lorena Andrea) who leaves the lab when she learns Ava is at the threshold of the door. Lilith's claws, which she uses to dispatch Sister Crimson, continue to suggest she's been altered by her time in hell. However, Ava's discovery underneath the tomb raises all kinds of questions about what she has been told of the Halo, demons, the battle between good and evil, and raises doubts about what the right move is from here.