When the son of a Russian gangster is killed at his own engagement party, Danny delves into the world of the Russian mob and the family politics that exist. Meanwhile, Erin is thrown into a high-profile corruption case.

The city is buzzing with the annual festival, but when a live wire electrocutes a young man and causes a citywide blackout, Mina and Otis fight for his life. Meanwhile a dangerous mudslide leaves a young pregnant couple in peril and the doctors scrambling...

Coach Taylor feels threatened as East Dillon faces serious budget cuts; Tami is flown to Pennsylvania for the opportunity of a lifetime; The Lions begin their quest for state; Vince becomes the man of the house again.

After a wild night out on the town for her bachelorette party, Brooke and the girls try to piece together the night before amidst the wreckage of the day after.

Marti endures a tense ride to sectionals with the Hellcats on the heels of her admission that she hooked up with Dan. Alice’s father surprises Alice when he shows up to watch her fly. Alice confides to Lewis that she hasn’t told her father that they broke...

House and the team try to link symptoms of a teenage military recruit and his drill sergeant; House secretly helps Cuddy’s daughter get into a prestigious preschool; someone posted a disparaging photo of Chase on a social-networking site.

Sarah begins an undercover mission to save Mama Bartowski and take down Volkoff with the aid of Casey, Chuck, and Morgan. Ellie and Awesome argue over what to name their baby.