Returning for its second season, The Vampire Diaries is the story of two vampire brothers obsessed with the same beautiful girl, who are battling to control the fate of an entire town. During season one, Stefan Salvatore (series star Paul Wesley) and Damon Salvatore (series star Ian Somerhalder) returned to their hometown of Mystic Falls, Virginia, for very different reasons: Stefan was determined to get to know Elena Gilbert (series star Nina Dobrev), who bears a striking resemblance to Katherine Pierce, the beautiful but ruthless vampire the brothers knew and loved in 1864, while Damon was intent on releasing Katherine from the tomb where he believed she was trapped by a witch's spell all those years ago.
In the season one finale, Elena's Uncle John (recurring guest star David Anders - Alias, 24) set a plan in motion that brought the Founder's Day celebration to an end amid chaos, destruction and death, and saw the return of the vengeful Katherine Pierce (also played by series star Nina Dobrev). Elena's troubled younger brother, Jeremy Gilbert (series star Steven R. McQueen), was so devastated by the death of Anna (recurring guest star Malese Jow - Hannah Montana), the vampire who befriended him, that he lost all hope and took an overdose of pills. That same night, Tyler Lockwood (series star Michael Trevino), Matt Donovan (series star Zach Roerig) and Caroline Forbes (series star Candice Accola) were in a serious car accident while trying to escape the chaos in the town square, and Caroline was rushed to the hospital. The events of that terrible night will also have long-range effects on Bonnie Bennett (series star Kat Graham), the powerful witch who was Elena's best friend until the vampire brothers came between them; Alaric Saltzman (series star Matt Davis), the vampire hunter who has become an unlikely ally for Stefan and Damon; and Jeremy and Elena's aunt, Jenna (series star Sara Canning), who has yet to discover the violence that occurred in her own home.
01 - The Return
As season two begins, the action picks up on the same night as last season's finale, and Elena arrives home to a nightmare as she discovers the fate of Uncle John and Jeremy. At the hospital, Sheriff Forbes (recurring guest star MARGUERITE MACINTYRE - Kyle XY) is comforted by Matt, Bonnie and Damon while she waits to hear if her daughter, Caroline, will survive the car accident. After a confusing conversation with Elena about the night's events, Damon is the first to realize that Katherine has returned. Katherine's arrival sends Stefan and Damon on a path to find out what she wants, why she's back and how much of a threat she is to the people they love.
02 - Brave New World
When a confused and desperate Caroline leaves the hospital and joins her friends at the Mystic Falls Carnival, Damon wants to take immediate action, but Stefan and Elena come to Caroline's defense. Matt is completely mystified by Caroline's behavior, but still tries to tell her about his feelings for her. Meanwhile, Damon has suspicions about Tyler's Uncle Mason (recurring guest star TAYLOR KINNEY) and uses Tyler's volatile personality in an attempt to get Mason to reveal his secret. Upset with everything going on around her, Bonnie takes her anger out on Damon.
03 - Bad Moon Rising
Elena, Damon and Alaric take a road trip to Duke University and search through Isobel's research on folklore and paranormal phenomena to see if they can uncover any clues to the mystery surrounding the Lockwood family. Isobel's former student, Vanessa (guest star COURTNEY FORD - Dexter), offers to guide them through the research and ends up getting quite an education herself. Stefan comes face to face with a terrifying new danger in the woods, and Tyler makes a shocking discovery about Mason (recurring guest star TAYLOR KINNEY).
04 - Memory Lane
Stefan takes drastic measures to find out the real reason Katherine has returned to Mystic Falls, and is shocked when she reveals new secrets about what really happened in 1864. Damon tries a new tactic to resolve his issues with Mason (recurring guest star TAYLOR KINNEY), but it proves costly. Meanwhile, Tyler pushes Mason to tell him the truth about the Lockwoods, and when Katherine delivers an ultimatum, Stefan and Elena are left with very few options.
05 - Kill or Be Killed
Tyler learns more about the Lockwood family curse from Mason (recurring guest star TAYLOR KINNEY). Stefan and Damon argue over how to handle Mason. Elena tries to keep Jeremy from becoming more involved with the Lockwood mystery, but Jeremy makes an effort to hang out with Tyler. Mason gives Sheriff Lockwood (recurring guest star MARGUERITE MacINTYRE) some startling information, leading to a night of violence, confession and heartbreak.
06 - Plan B
Despite Elena's efforts to keep Jeremy safe, he offers to help Damon and Alaric deal with Katherine. Sheriff Forbes (recurring guest star MARGUERITE MacINTYRE) and Caroline share a few rare moments of quality mother/daughter time. Bonnie accidentally discovers new information about Mason (recurring guest star TAYLOR KINNEY) and shares it with Stefan, which leads to Damon taking matters into his own hands.
07 - Masquerade
Stefan and Damon decide on a new plan to deal with Katherine at the Lockwood's masquerade ball. Katherine calls on an old friend, Lucy (guest star NATASHIA WILLIAMS-Romeo!, She Spies), to attend the ball with her. Bonnie, Jeremy and Alaric all do what they can to help Stefan and Damon, but Katherine has a surprise planned that none of them could foresee.Things take an ugly turn when Matt and Tyler start doing shots with their friends.
08 - Rose
Stefan and Damon come to Elena's assistance and, in the process, learn surprising new information about people, vampires and events in the distant past. Jeremy helps Bonnie after she casts a difficult and exhausting spell, and Caroline does what she can to make things easier for Tyler. Plus, Stefan and Damon reach a new understanding.
09 - Katerina
Elena puts herself in a dangerous position as she searches for the truth about Katherine's past and what her own future may hold. Knowing that Stefan would never agree to her plan, Elena swears Caroline to secrecy. Damon uses a newfound confidant to help him try to discover the real purpose and power of the moonstone. Jeremy and Bonnie meet Luka Martin (guest star BRYTON JAMES-The Young and the Restless, Family Matters), a new student with a surprising family history.
10 - The Sacrifice
Elena decides to take matters into her own hands and offers a tempting incentive to Rose (recurring guest star LAUREN COHAN) for her help. When things take an unexpected turn, however, Rose calls on Damon to deal with the plan Elena has set in motion. Jeremy's reckless attempt to help Bonnie retrieve the moonstone lands him in a life-threatening position and forces Stefan to put himself in danger. Meanwhile, Bonnie and Luka (recurring guest star BRYTON JAMES) form a closer connection, and Tyler shows Caroline the Lockwood cellar, where she makes a discovery that leaves them both terrified.
11 - By the Light of the Moon
As the full moon approaches, Caroline helps Tyler prepare for the transformation he is powerless to stop. While Stefan and Katherine play mind games on one another, Damon and Alaric are suspicious when a stranger named Jules (recurring guest star MICHAELA McMANUS-One Tree Hill, Law & Order: Special Victims Unit) shows up in Mystic Falls, searching for her missing friend, Mason. Elena is frustrated at the lengths Jeremy and her friends have gone to in order to keep her safe. Bonnie and Luca (recurring guest star BRYTON JAMES) work together on a spell, while still keeping secrets from one another. Finally, Elijah (recurring guest star DANIEL GILLIES-Spider-Man 2) makes an unexpected appearance with an offer that could change everything.
12 - The Descent
Stefan has his own ideas about Elena's new plan for the future. While Damon tries to get the truth out of Jules (recurring guest star MICHAELA McMANUS), he asks Elena to keep an eye on Rose (recurring guest star LAUREN COHAN), a situation that turns unexpectedly dangerous. Caroline and Matt try to be honest about their feelings for one another, and Tyler's reaction to Caroline's generosity comes as a surprise to her. Meanwhile, Damon struggles to hide his true feelings when a life-and-death crisis hits him harder than he expected.
13 - Daddy Issues
Johnathan Gilbert's (recurring guest star DAVID ANDERS) return to Mystic Falls comes as an unhappy surprise to Elena,Jenna and Damon. Caroline lets Stefan know about her conversation with Tyler, and Stefan does his best to reach out to a confused and conflicted Tyler.Jeremy comforts Bonnie after her disturbing conversation with Jonas (recurring guest star Randy Goodwin-Girlfriends). Plus, when Jules (recurring guest star MICHAELA McMANUS) takes a hostage, the situation quickly escalates into a violent confrontation.
14 - Crying Wolf
Stefan and Elena get away for what they hope will be a romantic weekend at the Gilbert family lake house, not realizing that they've been followed. Jenna starts to worry that Alaric isn't being honest with her. Jules (recurring guest star MICHAELA McMANUS) explains the importance of the sun and moon curse to Tyler, but leaves out an important detail. Damon attends a tea at the Historical Society in order to talk to Elijah (recurring guest star DANIEL GILLIES), but Elijah isn't giving up any secrets. With help from Caroline and Jeremy, Bonnie uses deceptive measures to get shocking new information out of Luka (recurring guest star BRYTON JAMES). Finally, Tyler offers Matt some relationship advice.
15 - The Dinner Party
Stefan tells Elena about a dark time in his history and the surprising person whose influence changed everything. After getting the truth out of Luka (recurring guest star BRYTON JAMES), Jonas (recurring guest star RANDY GOODWIN) makes his feelings clear to Bonnie and Jeremy.Trying to catch Elijah (guest star DANIEL GILLIES) off-guard, Damon arranges a dinner party for him with Jenna, Alaric and Andie (recurring guest star DAWN OLIVIERI-Heroes), but last-minute information throws Damon's plan into chaos.
16 - The House Guest
Katherine's mind games are getting on everyone's nerves, but Damon, Stefan and Elena realize that her knowledge of Mystic Falls' history will help them stay alive. Frustrated with her relationship with Matt, Caroline finds a new way to get his attention. Alaric makes a surprising confession to Jenna, and Katherine makes a different kind of confession to Damon. Meanwhile, Stefan and Bonnie try to convince Jonas (recurring guest star RANDY GOODWIN) and Luka (recurring guest star BRYTON JAMES) that they should all be working together, but Jonas' lack of trust leads to a violent and fiery confrontation.
17 - Know Thy Enemy
Elena and Alaric both lash out at John (recurring guest star DAVID ANDERS) when Isobel's (recurring guest star MIA KIRSHNER) unexpected arrival leaves Jenna devastated. Bonnie works with Damon and Jeremy to find the spell they'll need to harness her ancestors' power, and a heartbroken Caroline doesn't know what to do about Matt. Plus, Stefan and Damon realize they have a new secret weapon.
18 - The Last Dance
As the high school prepares to throw a "1960s Decade Dance," Elena starts receiving disturbing messages from Klaus via an unusual source. Bonnie tries to reassure Jeremy that she is strong enough to help Elena, but a worried Jeremy asks Stefan for advice. Caroline talks Matt into taking her to the dance. Expecting Klaus to show up at the dance, Damon and Alaric attend as chaperones, but Klaus is playing a complicated game that keeps them on edge. Finally, Damon comes up with a new plan of action that shocks and upsets everyone.
19 - Klaus
Stefan and Damon are furious when they discover that Elena has defied them both to make a new ally and take control of the plan to out-maneuver Klaus (recurring guest star JOSEPH MORGAN-Ben Hur, Doc Martin). Disagreement over how to protect Elena leads to growing tension between the Salvatore brothers. Meanwhile, Stefan has his hands full trying to keep a confused and frightened Jenna safe. Flashbacks to 1491 reveal Katherine's introduction to Elijah (recurring guest star DANIEL GILLIES) and Klaus, along with the origin of the moonstone curse. Plus, Elena learns shocking new information about Klaus' motives.
20 - The Last Day
Damon is willing to go to extraordinary lengths to prevent Elena from being a victim of Klaus's (recurring guest star JOSEPH MORGAN) plan to break the curse. Damon's actions put him at terrible odds with Stefan and the tension that started brewing between the brothers over their differing opinions of how to help save Elena's life blows up into a full-scale conflict. Tyler returns to Mystic Falls after receiving a disturbing phone call. With the full moon marking the arrival of the sacrifice ritual, Stefan and Elena spend a romantic day together afraid it might be their last.
21 - The Sun Also Rises
With the arrival of the full moon, Elena tries to prepare for whatever Klaus (recurring guest star JOSEPH MORGAN) has planned and Tyler faces his second transformation. The terrifying events quickly spin out of control, despite an unexpected act of courage. Finally, Damon admits the truth to Stefan about a terrible new development they must face.
22 - As I Lay Dying
In the season finale, while Mystic Falls presents a screening of "Gone with The Wind" in the town square, Damon's memories of Katherine in 1864 mix with the reality of Elena in the present day. Stefan pays a terrible personal price for his attempt to prevent a tragedy, and Sheriff Forbes (recurring guest star MARGUERITE MacINTYRE) makes a deadly mistake while trying to keep everyone safe. More than one life hangs in the balance as the consequences of the sacrifice ritual play out to a horrifying conclusion.