"The Fosters" season 4 is set to return in a month and latest updates about the new episode 10 suggest that it will see the return of Callie's sister Sophia.

Freeform recently released a sneak peek of the episode titled "Collateral Damage," where Sophia is shown helping Callie and the rest of the Adams Foster family in organizing a "Justice for Jack" booth at a music festival. In the video, Sophia stumbles upon Callie's new friend Aaron and asks her sister who the "cute" guy is. While she and Callie are talking, Brandon's dad, Mike, overhears Callie and Sophia, making him wonder what the real score between Callie and the new male character is.

The clip also shows Mike confronting AJ about Callie's closeness with Aaron. The move seems to not sit well with AJ, who feels that his adoptive dad does not want him to date Brandon's fling. In the video, AJ tells Mike that if he cannot support his relationship with Callie, he will leave their home by the time he turns 18.

As for Nick, he is finally released from the rehab and plans to rekindle his connections with his ex-girlfriend Mariana and their daughter by calling and stalking her. Freaked out, Mariana tells Jesus to ask her ex-boyfriend to stop bugging her. Unfortunately, the sneak peek shows Nick not listening to Jesus, so he follows Mariana to the music festival. He even urges him to ride in his car.

"The Fosters" season 4 (Part A) will be available for streaming on Netflix on Sept. 28.