Episode 4 of "The Fosters" Season 3 was full of drama. Brandon (David Lambert) got kicked out of his music camp after plagiarizing a Bach piece and Mariana (Cierra Ramirez) broke up with Mat (Jordan Rodrigues) after finding out his tour would be extended for a few more months. Plus, Callie (Maia Mitchell) was surprised to find out that the A.J. (Todd Williamson) might have feelings for her. How will it all play out in episode 5, "Going South?"

According to the synopsis for the new episode, in the wake of his dismissal from music camp, Brandon will take off on a spontaneous trip to Mexico with Callie. Callie is the only person Brandon told about getting kicked out of camp, so it makes sense the two would spend some extra time together. However, the promo for the episode teases some drama on their border crossing expedition. Brandon has noticed that A.J. and Callie seem to have a love connection and he is worried. Callie, though, denies that anything is going on between them. 

The synopsis for the episode also reveals that Stef (Teri Polo) and Lena (Sherri Saum) will be worried after finding an empty box for a pregnancy test. The promo hints that Mariana, who slept with Wyatt (Alex Saxon) at the end of Season 2, might be the test's owner. In the teaser video, Stef and Lena argue about how they will handle it if Mariana really is pregnant. 

Watch the promo for episode 5 below:

Is Mariana pregnant? Will Callie and A.J. develop into a romantic relationship? Fans will have to wait to find out. "The Fosters" airs Mondays at 8 p.m. EDT on ABC Family.