The season premiere of The Fostersstarts off with a bang... and that's before anyone realizes that Nick (Louis Hunter) has a gun. The episode picks up moments after the Season 3 finale, with Stef (Teri Polo) and Lena (Sherri Saum) reeling from Callie's (Maia Mitchell) confession that she and Brandon (David Lambert) slept together.

Catch up on all this week's Mega Buzz!

But that's just the tip of the iceberg. "Some other secrets have to come out — it's not just the one thing," executive producer Joanna Johnson teases. "[Stef and Lena] are blown away and blindsided. They also feel betrayed. They feel like the trust they put into Brandon and Callie was clearly for naught."

Crave scoop on your favorite TV shows? E-mail questions to mega_scoop@tvguide.com or drop us a line at Twitter.com/TVGuide.