The DA's office is forced to tackle an embarrassing case involving domestic terrorists, the explosion of a synagogue with materials supplied by the police, and an informant who may have been lying all along to keep out of trouble.
An alien girl asks for Ben's help to end a war that's lasted for years.
A new HMO restriction on individual therapy forces Monk to join one of Dr. Bell's groups just as its members are being murdered.
Shawn and Gus are hired to protect a guy who thinks he's a werewolf and find there's more to his story than they thought.
With the ship out of FTL for twelve hours, Lt. Scott, Sgt. Spencer, Ian, Dr. Rush and others travel down to the planet to find the minerals necessary for the scrubbers to provide them with breathable air. They find a desert planet that should have what they need but they will have to locate a dried lake bed as it will be the likely source. Scott recalls some of his troubled past. As time winds down, some of the team decide to use the gate to transport themselves to a habitable planet, despite Ian's advice to the contrary. Chloe Armstrong communicates with her mother ...
A visit at his daughter's murder site leads Ben forward in his investigation. Eddie undermines Bo's authority in Tyler's eyes. Seth is missing, looking for a sign of his purpose on Earth.
The comical seafaring adventures of a young, enthusiastic boy, his pirate captain mentor, and the talking whale that raised him from birth.
Nikki's had enough - she quits Khaki Barn, for good this time! Only problem is, there aren't any other jobs available at the mall except at a new kitchen cooking & accessories store, Counter Measures.
Violet's emotional reaction to her attack has all her friends on standby alert, afraid she'll freak out. Addison makes no effort to ease tensions between her and Naomi, while the practice tries to deal with a woman they feel is covering up something when her husband shows up at the hospital with a stab wound.
Leslie is nervous about her first date with Dave, so Ann takes her on a practice date to help her prepare. Meanwhile, after a local councilman is caught up in a sex scandal, Tom, Ron, April and Mark decide to see who can uncover the worst dirt on each other.
When Meredith and Lexie's father, Thatcher, returns to the hospital with a failed liver, it's up to Meredith to save his life. Meanwhile, Izzie empathizes with a patient riddled with tumors, as Mark, annoyed with Cristina's competitive zeal, tricks her into assisting on an unusual surgery.
Stefan takes action to protect Elena. Stefan is hopeful that his plan to get rid of Damon is working. Elena and Jenna are concerned about Jeremys relationship with Vicki. Stefan decides to reveal parts of his past to Elena. At a fund-raising car wash, Bonnie is surprised by abilities she didnt know she possessed, and seeks advice from her grandmother. Finally, Elena hears a disturbing story about the Salvatore family from a stranger.
For Professor Duncan's psychology research team, Abed and Troy are recruited as test subjects by Annie. Also, Shirley and Jeff start to bond as they gossip about Britta and her boyfriend.
Sam and Dean head to a small town where people are murdered by famous dead icons. However the brothers come to a dead end when two teenagers reveal they saw Paris Hilton kidnap their friend.
Jane, Cho, Rigsby and Van Pelt decide to conduct their own investigation when Lisbon is accused of murdering a child molester she arrested who was recently paroled.
Olivia begins to regain her memories of her encounter with William Bell. Meanwhile, the First Wave tries to collect the head of their leader, and the traitor makes his move.
Mark and Janis arrive in Germany to discuss the past events regarding the blackouts. Demetri fears about his future. Meanwhile, Aaron tries to get Mark to help him with an appeal.
The Dunder Mifflin staff head to Niagara Falls for Jim and Pam's wedding, with the understanding that her pregnancy is a forbidden discussion topic, but Jim's slip of the tongue prods Michael to attempt damage control.