When George becomes frustrated with Max's dentist, he lobbies to have the company's dental plan changed.
To make Cheryl feel desirable, Jim fakes a jealous rage in a restaurant and tries to teach Dana's date to do the same, but the lesson backfires when Dana fears her new beau is paranoid and possessive.
A man injured in a bar fight teaches Turk and J.D. a lesson about living life to the fullest.
Haley is surprised when her older sister Taylor comes to town, but not as shocked as Nathan, who recognizes Taylor from a past tryst. Brooke and Felix decide to become boyfriend and girlfriend. Jake makes a special visit to Peyton. Anna tells a secret to Lucas.
Jack initiates a fierce gun battle with the terrorists as he races to rescue Heller and Audrey before the military strike begins. Dina questions her own dedication to their cause when her husband reveals his plans for Behrooz. Driscoll and Curtis uncover new evidence that points to an even bigger attack by the terrorists. Audrey has an awkward meeting with her husband, and Heller butts heads once again with his son.
Allison tries convincing Devalos that she heard a witness misinforming a police sketch artist, making them look for the wrong man. Meanwhile, 6-year-old Bridgette's new playmate indicates that another member of the family can see the dead.
With a group of Wraith hive ships on the way to Atlantis, the team searches for a place to flee and a way to destroy the city. McKay leads a team to try and activate the Ancients' orbital weapons platform.
Ed receives an unexpected visit from a beautiful former co-worker, whose mere presence puts everyone's lives in serious danger. Danny and Mike are enlisted to protect the gorgeous womanwith a mysterious background, and find it to be much harder than expected. Meanwhile, Delinda and Nessa compete for the affection of a high-roller. What once began as a friendly competition turns into an all-out war as the two vie to see who is more appealing. Elsewhere, a man's bride-to-be strands him at the altar, leaving Mary to save his trip from being a complete disaster.
When Jake's girlfriend (guest-star Jessica Collins) from Los Angeles arrives in Everwood unexpectedly, Nina comes to his rescue with a shoulder to lean on as he wants to get rid of her and the possibility of more with Nina. Also, Ephram and Amy are back together. He is being the "new supportive boyfriend she deserves." Meanwhile, Harold and Rose worry about Amy after she sets her mind to auditioning for a rigorous ballet program in Denver, and Andy unintentionally humiliates Delia in front of her hockey team.
When Commander Adama learns that Kara disobeyed orders and Jumped to Caprica on orders from President Roslin, he demands the president's resignation, with the implied threat of a military coup. Roslin refuses his demand and sparks a confrontation.
The family tries to decide where to go on vacation. Sharon turns down Fiji because none of the hotels meet her standards, while Ozzy nixes a number of other locations for various reasons. Sharon ultimately decides on Hawaii, although Ozzy is still reluctant to go. Meanwhile, Kelly wins a major role in a television pilot. She must miss out on the family's vacation to go to Vancouver for filming.
Paige and Matt (Mr. Oleander) desperately try to keep their relationship a secret but it seems to be an impossible mission when Mr. Simpson spies them together at the park and Manny spreads rumors about them to Hazel. Emma has a ladies night and all her girlfriends are head over heals for Emma's new neighbor, Chester.
Bryce and Jen Bullard are a Colorado couple who are struggling to manage a busy plumbing business and raise two unruly children. The Bullard household is chaotic, with work phones ringing off the hook and kids screaming late into the night. The Bullard boys, two-year-old Rylan and six-year-old Brycie, have full rein of the house. Jen and Bryce have very different views of parenting; Jen is more lenient, while Dad is quick to punish. In order for Bryce and Jen to gain control of their household, they must learn get on the same page with their discipline and follow the Supernanny method.
Hank is asked to be Dog River's goodwill ambassador and show an American tourist around. Turns out Hank isn't the best choice and Brent is called in to clean up. Then a new ATM machine at the liquor store draws a loyal following, leaving Lacey to wonder where all her customers have gone. And in an effort to learn French, Karen tries to immerse herself in Dog River's rich but non-existent francophone community.
Eric Camden, a minister, and his wife Annie deal with the drama of having seven children, ranging from toddlers to adults with families of their own.
On June 10, 1990, the cockpit window blows out on British Airways Flight 5390, partially ejecting and injuring the captain through the hole. A member of the cabin crew clings to his legs as the co-pilot completes an emergency landing without any fatality. The captain is found to be still alive after being outside the cockpit for 21 minutes.
Jill goes to Canada to see if the Spanish Flu body is still in the ground. David recovers from his coma and limps back to the office. Daisy recognises the person who created the Miranda virus and infected her baby. David identifies the vector for the Spanish Flu epidemic and tracks it with GPS.
JJ and Beth began searching for the perfect house, but JJ recieves a letter from Vietnam and gives away their money for a house. As their wedding day approaches, the family is busy preparing. JJ learns that Helen is involved with an anti-war movement while Patty falls for Beth's cousin. Meg continues to struggle with Chris who keeps showing up. When Meg realizes her true feelings it's too late as Chris has left town.