As Reese and Finch try to save a hotel maid's life, they encounter a litany of suspects; Detective Carter considers a significant offer from the FBI.
Sherlock investigates what he believes will be an open-and-shut case after Detective Bell is attacked. However, the case takes an unexpected turn when the suspected assailant is found dead. Meanwhile, Sherlock encourages Joan to learn self-defense.
Julie Gristlewhite welcomes the men who will be competing for her heart.
Julie enjoys getting to know her guys during a cocktail party until several game changers change the game.
The guys search for a perfect Valentine's Day gift for their significant others; Stuart and Raj host a "lonely people" party at the comic book store.
On the way to a Halloween party, the study group must free Pierce from his panic room and slowly comes to suspect that his mansion is haunted.
As the hospital spirals closer to financial ruin, Owen must make some tough decisions, which includes foregoing an expensive surgery that could save the life of a child. Meanwhile, Alex and Jo work together to save the life of an infant, and April asks Jackson for dating advice.
On the island, Damon has an ugly run-in with a Hunter named Vaughn, and realizes he is one of The Five. Stefan confesses his true feelings about the possibility of becoming human again to Elena. When a stunning new piece of information about the cure is suddenly revealed, it changes the stakes for everyone. Jeremy helps Bonnie recognize what is real and what is an illusion, and Shane is comforted by a woman from his past, Caitlin. Back in Mystic Falls, Caroline and Tyler find that their attempt to translate the code on the Hunter’s Sword is futile without help from Klaus, who has his own reasons for solving the puzzle.
After a hurricane tears through the bayou on opening day of Alligator Season, delaying hunting for five critical days, the swampers turn to family to help make up for lost time. Complicating matters is the arrival of two new hunters who invade the Louisiana swamp from their native Texas and challenge King of the Swamp Troy Landry to a high stakes bet. The shortened season forces everyone to take bigger risks including one hunter who jumps into the water to wrestle a huge live gator that tries to get away.
Dana “Scottie” Scott returns to complicate Harvey and Jessica's battle against Hardman. But this time, she's brought the full force of her British firm.
The CSIs investigate the demise of a famous Cuban singer’s sister who’s in town as part of a U.S. tour. Meanwhile, Hodges begins to get cold feet at the prospect of marrying his Italian bombshell girlfriend.
After Oliver is shot, he turns to a surprising person for help - Felicity. Diggle is stunned when he sees Felicity walk through the front door of the lair dragging a dying Oliver behind her, and the two team up to save Oliver's life. As Oliver hovers between life and death, he flashes back to a seminal event on the island - a daring escape attempt with his new friend Slade Wilson.
Claire and Phil’s Valentine’s Day romp ends with Claire in the hospital. Jay and Gloria’s attempts at romance face constant interruption. After hosting a wild party, Cam and Mitch are left with hangovers and a new housemate.
Dawson attempts to help her brother Antonio unravel the details of his drugs-and-gang investigation, and goes behind his back in turning to an unlikely source for assistance. Casey and his mother, Nancy struggle with their new relationship. Meanwhile, as a favor to Lieutenant Whaley, Severide visits someone important from his past, while Herrmann and Otis learn some hard truths about their "silent partner" in the bar.
Derek is desperate to save the life of a baby bird that's fallen from a tree. Some of the residents attend a jumble sale. And Hannah forgets about her date with Tom.
The guys look for romance on the Web when they're alone on Valentine's Day.
Kevin deciphers the demon tablet and figures out how to close the gates of Hell. He tells Sam and Dean that according to the tablet one person must face a series of three trials, and the first one is to kill a hellhound.
Philip and Elizabeth discover that their murdered colleague Robert had a wife they never knew about. As they try to determine what she knows and where her allegiance lies, Stan's investigation into Robert's death puts him hot on their trail.
A look into the lives of men with ponytails; Fabrice Fabrice on the streets; Dr. Armond is newly single and ready for love.
Dagur the Deranged visits Berk to renew a peace treaty between the Berserkers and Berk, and the dragons are put into hiding to dispel rumours that Berk is training a dragon army. But when Ruffnut and Tuffnut begin to fight, their dragon, Barf and Belch, is left out of control. The Viking youths must bring the twins back together to control their dragon and avoid provoking Dagur to war.