With the knowledge that he has been betrayed by his siblings, Klaus and an unlikely friend plan to get even with them.

With time running out, Klaus' ultimate plan to protect baby Hope at all costs continues to take shape.Source: CW

Vincent joins forces with a figure from his past. Kaleb is forced to make a difficult life or death decision, and Elijah finds himself in the fight of his life. Hayley and Jackson become pawns in Vincent's dangerous plan.

Rebekah persuades Klaus and Elijah to take part in a family tradition from their childhood.

In order to show Elijah that her plan is what's best for him, Esther forces him to relive a time long ago when he loved a young woman named Tatia.

Hayley struggles with her powers. Marcel sides with Klaus and gets revenge over the wolves. Esther is busy plotting her own plans. Everyone wants control over the city.

Davina takes Mikael to a cabin to heal from his wolf bites. Klaus searches for them. Elijah, Marcel and Hayley try to rescue some young wolves.

Cami teams up with Marcel and Gia after she becomes suspicious of her faculty advisor Vincent. Lastly, in a surprising turn of events, Klaus comes face-to-face with a visitor from his past.

Hayley and Klaus need to hit a deadline to turn over Hope, which causes Klaus to proceed with a dangerous plan.

Klaus wants Hayley to re-establish herself in her pack. Mikael is impatient under Davina. Cassie arouses suspicions.

Rebekah is on the run with baby Hope.

Rebekah becomes interested in a girl. Hayley struggles with coming clean and is surprised by something Jackson admits. Klaus learns something and heads to confront Hayley. Vincent sets his eyes on Marcel for answers to what Klaus is hiding.

Following a tense run in, Elijah believes that Klaus is up to something. Kaleb needs Rebekah's help.

While searching for a way to vanquish Dahlia, Klaus is faced with another threat.

Going after everything Esther loves. Klaus and Hayley seek an antidote for Elijah in the bayou assisted by Marcel and Josh. Kaleb takes Davina to an old hangout.

Finn puts a spell on the compound, trapping wolves and vampires. Klaus takes Cami to the safe house, then confronts Kol about Rebekah's whereabouts.

After Klaus and Elijah receive a cryptic invitation to dinner from their mother, they get ready to expect the worst.

Finn captures his brother's spirits, while the vampires remain trapped and their hunger grows.

Elijah and Freya think differently about how to deal with Dahlia's deadline.

Klaus must put aside his mistrust for Freya in order to save Rebekah's life.

A discovery is made about the body Rebekah is living in. Klaus clashes with Hayley and Jackson.

Suspicious of where her true loyalties lie, Klaus invites Freya to the compound in order to gain more insight into her past with Dahlia.Source: CW