While Kenzi, Hale, and Dyson, are all living their lives, Bo is nowhere to be found. It's later realized that they simply forgot Bo, as someone was forcing them to. Massimo has been giving Kenzi temporary powers to appear Fae. Bo finally awakens to find herself on a train, and later jumps off. A group of Fae called the "Una Mens" are introduced. When she arrives home, it is discovered that while Bo herself did not consciously choose a side, her blood has chosen Dark. Tamsin is found reborn, as a little girl, and grows up with Kenzi as her pseudo-mom. Massimo steals from Bo and Kenzi in an attempt to convince Kenzi to pay him, and Bo figures out that he is not Fae, but human. He also kidnaps Tamsin to acquire her Valkyrie hair, and after being defeated by Bo, chases after the hair into a pit of lava, where at that point he is assumed to be dead. Many of Trick's secrets and past actions are revealed, including a tie to a past life of Tamsin's, and the fact that he used his blood to "erase" someone from existence. Tamsin discovers that by not taking the soul of a man named Rainer to Valhalla, she is part of the reason "The Wanderer" was created. Bo is able to get back on the train, where she finally meets Rainer, and brings him back to the Dal. Hale and Kenzi admit their feelings for each other. Lauren, who has been working with the Dark, somehow turns the Morrigan human. Kenzi's mother is introduced, and Hale attempts to propose. Massimo returns, and protecting Kenzi, Hale is killed. Kenzi tries to get revenge, but is stopped by Vex, who mentions that he is Massimo's guardian. Evony is revealed to be Massimo's mother, and gave him to Vex years ago when he was a boy. Bo learns that not only is her father coming, but that to close the portal, she will need to give her heart. That is revealed to be Kenzi, who sacrifices herself. It ends with Bo visiting Kenzi's grave.
S04E01 In Memoriam
Nov 10, 2013The gang takes on a case of stolen memory, only to discover they're all forgetting something… or someone. Meanwhile, the new Morrigan is hell-bent on making sure some memories stay buried forever.
1h
S04E02 Sleeping Beauty School
Nov 17, 2013Dyson seeks out an elemental Fae to rescue someone he loves. Meanwhile, Kenzi's stuck on babysitting duty – but her unlikely charge might be the key to cracking the case.
1h
S04E03 Lovers. Apart.
Nov 24, 2013Bo jeopardizes her life to save a haunted family. Meanwhile, Dyson races to be by Bo's side and Lauren's past catches up with her.
1h
S04E04 Turn to Stone
Dec 1, 2013When the Clubhouse is robbed, Kenzi's forced to make a confession that could threaten her friendship with Bo. Meanwhile, an angry and frustrated Bo does the unthinkable - she confronts a dangerous foe and makes a shocking discovery.
1h
S04E05 Let the Dark Times Roll
Dec 8, 2013Bo's quest for answers leads the gang to a Dark Fae party, with a dangerous guest list. Meanwhile, Trick is summoned to appear before the Una Mens.
1h
S04E06 Of All the Gin Joints
Dec 15, 2013Bo 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.
1h
S04E07 La Fae Époque
Dec 22, 2013Bo and Lauren team up to venture into Dyson's memory when he's on trial for a murder.
1h
S04E08 Groundhog Fae
Dec 29, 2013Bo's friends are too busy celebrating Yule to notice she's missing. But when the night starts repeating itself, Bo makes it her mission to stop it.
1h
S04E09 Destiny's Child
Jan 12, 2014Bo resolves to go to hell and back to get the answers she's been searching for, with or without her friends' support. Meanwhile, Kenzi's determined to uncover what Trick's hiding.
1h
S04E10 Waves
Jan 19, 2014With 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.
1h
S04E11 End of a Line
Jan 26, 2014After Bo narrowly escapes an attack by a vengeful Fae, the team tracks down who sent it, only to make Bo doubt her feelings for someone she loves. Meanwhile, Kenzi's surprised by a visit.
1h
S04E12 Origin
Feb 9, 2014Bo 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.
1h
S04E13 Dark Horse
Feb 16, 2014Bo 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.
1h
S04Enull An Evening at the Clubhouse
Nov 10, 2013Before the season four premiere, the Lost Girl pre-show features cast-on-cast interviews, exclusive webisode footage, and a special season four sneak peek. During the show, the cast reflects on both the past and upcoming seasons, reveal behind-the-scenes stories and respond to fan questions.
1h
