Hoffmann insists on further training despite the crew’s desire to head to battle. In La Rochelle, Simone pieces together the previous night’s events.

Tennstedt and Hoffmann continue to butt heads aboard U-612, while rebel Carla Monroe plans a mission in La Rochelle.

Unity on U-612 has crumbled and Hoffman and Tennstedt’s continued conflict could jeopardise the mission. On land, Simone wrestles with a difficult choice.

The U-boat crew struggle with recent events and what lies ahead. A revelation in La Rochelle infuriates Forster spelling bad news for Simone.

Einstein and his wife Elsa attempt to flee Germany after the rise of the Nazis, but they face unexpected roadblocks.

The story of Albert Einstein, seen through glimpses of his twilight years and flashbacks to his time as a student in Munich and Zürich in the 1890s.

At the clinic, OA discovers what happened to her friends back at Hap’s. Karim turns his attention to a doctor who worked for Pierre Ruskin.

After a harrowing ordeal, OA and Karim find themselves locked inside a labyrinth of puzzles. Nagging doubts prompt Homer to snoop on Dr. Percy.

Karim returns to the house with reinforcements, OA tries to access Nina’s memories, and Hap offers to discharge Scott — after one last experiment.

While private eye Karim Washington scours San Francisco for a missing teen who was involved in a cryptic game, OA wakes up in unfamiliar surroundings.

A prank in a high school science class goes terribly awry, injuring a teacher and several students. Hathaway discovers Meg’s drug addiction. Weaver and Greene notice Lawrence gets easily confused.

Angel’s hotel is infested with demonic slugscreated by the spell he used to alter Sahjhan.

Angel pursues Connor, who makes a new friend on the streets; something else comes through the portal from Quor-toth; Lilah approaches Wesley.

Holtz insists that Connor rejoins Angel; Justine learns Holtz is back; the Groosalugg realises the depths of Cordelia’s feelings for Angel.

Connor returns to Angel to seek his revenge; Angel and Cordelia acknowledge their feelings for each other.

When a warlock brings Connor back into Angel’s life, Wesley finds out that Angel has tinkered with the memories of his friends.

Angel and his friend’s prepare for their “suicide” attack on the circle of the Black Thorn.