Vampire Diaries season 6 episode 12 synopsis: Will Sheriff Forbes' death open doors for Stefan and Caroline romance?
Sherriff Forbes may die in 'Prayer For the Dying' Vampire Diaries/Facebook

The Vampire Diaries Season 6 will air episode 12 on Thursday this week and fans need to brace themselves for the worst as Caroline may have to go through the pain of losing her mother, Sherriff Forbes.

The upcoming episode is expected to bring the biggest threat ever on Mystic Falls but this time the threat is human and not supernatural.

Caroline finally gets the solution to save Sherriff Forbes and asks her mother to drink her blood. However, the attempt turns futile as the cancer spreads faster within her body.

The official synopsis for episode 12 reads:

When Liv (guest star Penelope Mitchell) and Luke's (guest star Chris Brochu) father arrives to town to celebrate their birthday, they try and convince him to let Jo (guest star Jodi Lyn O'Keefe) and Kai (guest star Chris Wood) take their place in the merge ceremony. After Tyler (Michael Trevino) finds out that the merge is happening sooner than he expected, he urges Liv to let him talk to her father. Meanwhile, after Caroline's (Candice Accola) plan to cure her mother takes an unexpected and devastating turn, Elena (Nina Dobrev), Stefan (Paul Wesley) and Damon (Ian Somerhalder) gather at the hospital, while Jo attempts to save Sheriff Forbes' (guest star Marguerite MacIntyre) life. Lastly, with the merge set to take place, Damon's risky plan quickly sends things spiraling out of control, forcing one of the twins to take matters into their own hands. Jeffrey Hunt directed the episode written by Brett Matthews & Rebecca Sonnenshine (#612)."

In the previous episode, Damon saves Elena with the help of Jo but Bonnie remains trapped. Both the Salvatore brothers and Elena will be at the hospital to comfort Caroline during the difficult time.

There are reports that Elena, Damon and Jeremy will try to send a message to Bonnie by using a broken Ascendant pieced together. However, things won't go as planned as their efforts unravel some disturbing mysteries.

The upcoming episode titled Prayer For the Dying is expected to deliver a high drama quotient as it will also feature the Gemini Coven merger.

Click here to watch episode 12 of TVD online.

The Vampire Diaries Season 6 airs every Thursday on the CW Network.