Kat Graham
Kat Graham as BonnieFacebook/The Vampire Diaries

"Kill 'Em All," the April 29 episode of the CW's "The Vampire Diaries," will continue focusing on the group's efforts to save Bonnie Bennett's life. Unlikely partnerships will be formed, and according to the official synopsis of the episode, Matt and Stefan will work together and the cop will finally reveal the reason why he hates the youngest Salvatore brother.

Also, Caroline will realise how much she has missed being a part of the supernatural world when she teams up with Alaric to save Bonnie. But their well laid out plan will take an unexpected turn when Ian Somerhalder's Damon takes a decision that will forever change his relationship with Bonnie.

Meanwhile, this Friday's episode is titled "Somebody I Used to Know" and it will see Enzo and Bonnie reaching out to Damon after Enzo's attempts to save Bonnie's life lands her in more trouble.
It remains to be seen if Damon will be able to mend his relationship with Bonnie, as the previous episode saw her slamming the door on his face. Bonnie feels Damon took the easy way out by locking himself in the coffin for three years, and it will take more than an apology to get back into his good books.

Elsewhere in the episode, we'll see Lucy making an appearance. In "One Way or Another," Virginia tells Bonnie the reason why the Armory is behind her and reveals that the only other Bennett witch they knew was Lucy. However, she disappeared before they could use her to open the vault. Based on the spoilers for this Friday's episode, Lucy will resurface in "Somebody I Used to Know," but she won't last long. Lucy will apparently be killed before the episode ends, leaving Bonnie to be the last Bennett witch.

The official synopsis for this Friday's episode, according to Wikia, reads:

When Enzo's efforts to protect Bonnie end up putting her life in jeopardy, they learn that Rayna may hold the key to her survival. With time running out and Rayna at the reins, Enzo and Bonnie reluctantly team up with Damon, who is desperate to save Bonnie's life and to repair their broken friendship. Elsewhere, when Stefan travels to Dallas and comes face to face with Alaric, tensions escalate and they are forced to confront the fallout from Stefan's absence in Caroline's life. 

 "The Vampire Diaries" airs Fridays on the CW.