The Fosters season 4
Callie will meet someone from her past in The Fosters season 4 episode 4Freeform

The Fosters season 4 returns with a new episode this Monday, where Callie uncovers some disturbing information as she works on her senior project, and Mariana decides to visit Nick to end their relationship. Episode 4 is titled, Now For Then, which will air on 18 July at 8pm EST on Freeform.

Click here to watch the episode live on Freeform Go, or click here to watch it online (only in the US). The official synopsis reads as follows:

Callie and Mariana will both try to face their fears and move on in the episode. Meanwhile, Brandon will throw a party at his and Cortney's place, and realise the complication of their living arrangements.

A promo for the episode shows Callie stopping by her previous foster house Olmstead house — where she was raped by her foster brother Liam — for a senior photography project. "It's amazing what kind of horrors can lie behind a white picket fence," says Callie.

Looking at Olmstead house, AJ asks Callie, "What's the story of this house?"

"Not a happy one," she replies.

Meanwhile, Mariana decides to visit Nick, to put an end to her fears.