Concerned that Bo’s plan is too risky, Trick offers Bo one more weapon for her own, and everyone else’s, safety. Bo must lead her friends into battle ahead of schedule when her hand is forced by their enemy. A revelation from Dyson provides Bo with ammunition, but another’s deceit threatens the mission. Prophecies come true… but at what cost?
In the wake of emotional losses, Trick reveals his deepest secret to Bo. Bo realizes there is no turning back and she must go to any extreme, which includes aligning herself with a sworn enemy, to take on a battle that could decide the fate of the Fae.
The Ash takes drastic action against the threat bearing down on him, which in turn convinces Bo to make a potentially life-threatening decision. When those close to her suffer devastating injuries, Bo can no longer ignore her destiny.
Bo confronts a very powerful Fae, uncertain whether she can trust The Ash’s counsel. The coming War takes its first casualties – literally and figuratively – which challenges Bo’s and Kenzi’s commitments to the cause and the ones they love.
Kenzi and Trick must race to save Bo from the fallout of a steamy night gone awry before it binds the Succubus for a millennium. In its wake, Bo poses very uncomfortable questions to Trick about her origins.
Things heat up when Bo tangles with Fae politics in an attempt to save some very important people. Meanwhile, Kenzi risks more than she intended when she does a favour for Hale.
Bo goes undercover as a high school teacher to investigate a mysterious case-Kenzi soon regrets agreeing to help her. Lauren makes a much anticipated return home from vacation.
What Bo uncovers while investigating the mysterious disappearance of human backpackers threatens her own fine physique. Meanwhile, the new man in Bo’s life sets events in motion that force Kenzi to make a desperate choice.
While Bo continues to ponder The Ash’s shocking proposal, she agrees to his interim request – to kidnap a Genie. The assignment becomes complicated and dangerous, and Bo finds herself involved with the most unlikely partner.
When Trick takes matters into his own hands to foresee the future, he runs the risk of revealing too much to the wrong Fae. Meanwhile, a furious Bo confronts The Ash about a betrayal… and is stunned by his response.
Bo enlists Dyson’s help to find an artifact she believes will release Lauren from her life of servitude to the Fae -- even though it might mean having to say goodbye to the good doctor herself.
When rich young humans start turning up dead, Bo agrees to go undercover to help Dyson find the Fae responsible. As she makes her way through the "Gossip Girl" world, Bo learns a deadly kind of class warfare is afoot.
Bo joins the brutal world of underground fighting to help a human competitor juiced up on Fae "steroids" that are sending him on blackout rages – and putting his son in harm's way. Meanwhile, the sister of the first boy she ever killed shows up and confronts Bo over her deadly past.
A night out at the Dal goes awry when an insane trickster spikes the beer with a substance that transfers Bo out of her body – resulting in a ripple effect that finds our regulars inhabiting the skin of their friends, lovers and rivals. Suppressed – and not so suppressed – feelings bubble to the surface, and the brief stays in one another’s bodies gives each surprising insights into the other.
Trick's dear friend seeks his assistance when his ballet dancer husband goes missing – or rather, his ballet dancer husband's corpse. Bo and Dyson track the dead ballet dancer to a bizarre figure, enlisting Lauren for her scientific expertise along the way.
Bo is happy for the distraction provided by an assembly of strippers that helps break an accused cop-killer out of the police station. While Bo goes undercover at a strip joint to follow the trail of one of the apparent accomplices, Dyson and Hale simultaneously track the murderer. Both investigations meet in the middle at The Hand of Glory – a disembodied hand with remarkable powers.
The Morrigan enlists Bo's help to find a tortured graffiti artist under her employ. The young painter has killed a Dark Fae, and his urban murals are exposing Fae secrets all over town – with The Morrigan on the hook for his actions.
Bo and Dyson team up to track down a stolen Mongolian Death Worm on behalf of Dyson's old wolf pack mate. When things get complicated, Dyson finds himself reliving his medieval days – tormented by the hard choices he once had to make, and fighting in the present not to repeat past mistakes.
In a move of sisterly solidarity, Kenzi drunkenly invokes the Russian hag Baba Yaga to curse Dyson for his behaviour towards Bo. In the sober light of day, however, Kenzi and Bo seek to remove the curse.
As Bo struggles to accept the new terms of her and Dyson’s relationship, she investigates an apartment building full of residents who appear to have lost their minds. Kenzi's choice to employ a Brownie to help around the house threatens to backfire on her.
The hunt for The new Ash is on. Literally. A traditional Stag Hunt is held, whereby the candidate who successfully tracks and kills The Stag becomes The next Ash. Bo barely takes a passing interest in this ceremony until a surprise visitor with a vested interest in the hunt appears in her front room.
In the season opener, a nomadic Fae sideshow comes to town looking to take advantage of the chaos that the bombing of the Light Fae headquarters has wrought. Unbeknownst to the general Light Fae populace, The Ash is in a coma, and his bond with the land is weakening – which makes this the perfect time for the travelling circus freaks to steal the most precious thing the Light Fae possess.