Credit: The CW

Next week will bring the 100th episode of The Vampire Diaries, and all spoilers point to it being one of the best yet. But what about the 99 that came before it? Series stars Candice Accola (Caroline) and Kat Graham (Bonnie) choose their favorite TVD episode of all time!

Candice went old school with her choice, picking the pilot episode of TVD as her favorite thus far. "It was huge. It was such a huge moment for me, personally, to get a job [laughs] and hope that the job would grow to what it's become now. Also, everyone was just so excited. No one came into the environment jaded," she told E! Online. "Everyone was so excited working on this project. The one thing I kept hearing over and over is, 'It's not usually like this,' so to know that in all the years that I will continue to work as an actress that that was a moment that was really special."

We totally understand the pick — the pilot was the episode that started it all and, on a professional level, it was such a life-changing moment for many of the actors involved in the show. But Kat went in a totally different direction for her favorite installment. Which episode did she pick as her absolute fave?

Kat called Season 3, Episode 5 (“The Reckoning”) her favorite. Interestingly enough, it was the 49th episode of TVD, which means it was roughly halfway through the series run thus far. And, yes, it was suitably epic. You may remember the episode as the one in which our Mystic Falls teenagers engage in senior prank night — until Klaus turns up looking for the answer to why his hybrids are dying, and starts some pranks of his own. He asks Bonnie to find the answer to his little problem, starting Tyler’s transformation into a hybrid as incentive. Basically, if Bonnie doesn’t find the cure, Tyler will die.

"It was amazingly written," Kat said of the episode (agreed) — but it was also her personal experience filming that makes the ep so memorable. "I actually enjoy swimming, but it was an episode where I had to dive to the bottom of this pool and save Matt, who was chained to the bottom. He was literally chained with weights and we shot it for hours. I was forced to do things that made me really uncomfortable and I think that personally I great from that episode."

Aww. We love both of these leading ladies’ picks! It’s nearly impossible to choose a favorite episode of TVD, but these are both near the top of the list!

Do you have a favorite episode of TVD? What do you think of Candice’s and Kat’s choices? Sound off in the comments below!

Catch the next episode of The Vampire Diaries on Thursday, January 23, 2014 at 8 p.m. ET on the CW, followed by an all-new episode of Reign.

Kayti Burt is a contributing writer for Wetpaint Entertainment with a penchant for all things pop culture. Follow her on Twitter and Google+!