Credit: ABC Family/Video Still

We won’t get to start watching episodes for the second half of Pretty Little Liars Season 4 until this January, but filming is already well underway. We already know the first details for Season 4, Episode 19, and now writer Maya Goldsmith has revealed the title of Season 4, Episode 20.

On September 3, Maya shared on Twitter that Season 4, Episode 20 is titled “Free Fall.” The script is still in the process of being worked out, so the cast hasn’t begun filming it quite yet. “Super busy writing episode 420. But I'm very excited about it. Can't say more right now;)” Maya wrote.

Okay, so obviously something big is about to go down in this episode. But what? And which characters will be involved? Is anyone’s life in danger? Because with a title like “Free Fall,” we’re pretty sure that someone is about to take a very long plunge... quite possibly to their death.

Just in case you need a bit of help keeping the timeline of this season straight, Maya also helped clarify just where Pretty Little Liars is in relation to the finale. When a fan asked if Episode 20 was the one right before the last episode of the season, Maya set the record straight. “no, the season finale is 424. This is 420,” she wrote.

Four more episodes to go... and four more weeks for the Little Liars to recover from this mysterious “free fall,” whatever it may end up entailing!

Source: Maya Goldsmith on Twitter

Catch the Pretty Little Liars Season 4 Halloween special on Tuesday, October 22, 2013 at 8 p.m. ET/PT on ABC Family.