Mitch and Cam try to save an old tree in the park; Jay takes Manny to a kid’s Olympics-themed birthday party; Gloria and Claire have an eventful shopping trip.

Oliver encounters a mysterious woman, Helena Bertinelli, daughter of mob boss Frank Bertinelli, who he can finally be himself with, but he soon comes to realize she’s hiding dangerous secrets of her own. Helena is on her own personal mission of vengeance and Oliver is caught in the middle. Meanwhile, Tommy is blindsided by an unfortunate turn of events and turns to Laurel for support.

Marshall takes on his old friend/new nemesis Brad in the biggest case of his career. Meanwhile, the gang reminisces about their own run-ins with the law, leading to a debate over who was the biggest delinquent as a teenager.

Marshall takes on his old friend/new nemesis Brad in the biggest case of his career. Meanwhile, the gang reminisces about their own run-ins with the law, leading to a debate over who was the biggest delinquent as a teenager.

In the gang’s quest to rescue Danny, the time has come for Miles and Monroe to meet face to face. Meanwhile, on the verge of reuniting with her brother, Charlie is conflicted by a shocking discovery and Rachel tests Monroe’s patience.

A famous, liberal lawyer hijacks Diane and Alicia’s latest case. When Alicia’s mother visits for Thanksgiving, she seeks legal support.

Brody makes a necessary phone call. Saul teams up with Virgil and Max to dig up some information on one of their own. Carrie finds herself preparing for the most important meeting of her career.

The CBI team investigates the murder of a real estate agent with former gang ties, while Jane searches for leads on his new connection to Red John.

Adama dogfights Raiders while the Battlestar Osiris tries to hold off a Cylon Basestar.

Adama, Coker and Dr. Kelly trek abandon the Weasel and trek through Djerba’s harsh wind and snow, following a signal with Dr. Kelly’s communicator. They track the signal to a huge cave, where they discover their escort unit dead from mysterious non-artillery wounds. Suddenly the cave floor collapses and plunges them into a dark underground chamber. Strange noises surround them and a large snake-like creature lunges out and bites Coker. As Coker struggles to contain the monster, a man rappels into the chamber and kills the snake. He introduces himself as Toth, the only surviving escort. He explains that the snakes, which killed his unit, were created by Cylons doing half animal/half machine experiments. Toth has been alone in the cave for some time and is slightly mentally unstable, prone to unpredictable aggressive outbursts. Nevertheless, he has scouted a route to Dr. Kelly’s objective. They leave the cave and stop at a cliff overlooking a seemingly abandoned resort compound.