The group discover their memories have been manipulated and they have forgotten about Bo completely. Kenzi must confront a powerful Fae to regain their memories. Vex refuses to co-operate until forced to by Hale.

Dyson seeks an elemental Fae to save someone you love. Meanwhile, Kenzi is stuck in a job as nanny - but its likely cost can be the key to unlocking the case.

Bo escapes the 'Death Train' only to be confronted by a body jumper. Dyson tracks Bo down and helps her out. Lauren tries to escape the Fae only to be double-crossed.

Lauren is in trouble. Her secret history is revealed. Bo and Kenzi make a deal with the Druid. Tamsin grows further. The gargoyle visits Bo, resulting in a revelation for her.

Bo gets a surprise from the Una Mens, and another surprise when she confronts the Dark Fey leader. Lauren reappears. Trick also gets a surprise when called to the Una Mens. Bo gets a hand from Vex. But who is Rainer?

Bo fights for the freedom of a talented opera singer, whose voice could be the key to unlocking the answers she seeks. Meanwhile, Kenzi is threatened by someone from Hale's past.

After the Una Mens has taken Dyson because he broke a Fae law, Bo has to travel back into Dyson's memory in order to prove his innocence and to stop his execution.

Bo gets wound up by Krampus. Will Lauren help Vex? Also, should Lauren & Dyson give Bo the box she sent herself?

Bo seeks answers alone. Dyson & Lauren go in pursuit. Trick looks elsewhere for lost memories. Kensi & Tasmin try to work out his intent. On Bo's return, the one most taken aback by her news is Trick.

With the gang still reeling from Bo's shocking announcement, Kenzi signs them up for an undercover mission at a mysterious corporation. Meanwhile, Bo retraces the steps that may lead to her destiny.

Tamsin's mentor Acacia resurfaces when Revenants attack Bo, Hale invites Kenzi's mom and cousin to visit to witness a momentous event, Dyson questions Rayner's intentions, and Bo learns the devastating truth of the Leviathan's warning.

Bo is reluctant to comply with her role in a prophecy foretold by an order of Knights, until advice from a surprising source helps her make a difficult decision.

Bo is forced to make the hardest choice of her life when an unthinkable sacrifice is the only thing that can stop a supreme evil from wreaking destruction on her world.