Mike travels to Alaska for an adventure aboard a fish processing ship.
Samantha finds out about an endangered butterfly habitat and needs to stop her boss and the firm's construction project that would kill them. She decides to use Dena, who is clueless about Sam's plan, to go out with her boss and persuade him to stop the construction project. After Todd and Sam's passionate kiss, Sam is feeling ignored by him.
Lauren and Lo are looking into the real estate market as they plan to buy a house. Meanwhile, Audrina reconsiders her situation as a single woman.
Allison has visions of a friend of Scanlon and Lynn DiNovi dying in a home mishap. This causes her to struggle with connecting some recent "accidental" deaths, consequently putting her own health in jeopardy.
Mia finally joins the spirit squad and finds her past is back to haunt her. Meanwhile Manny wants to meet Jay's parents.
While Robert and Kitty visit a fertility clinic, Rebecca and Justin decide to have DNA tests to see if they really are related.
Shredder begins to build a new dynasty in New York, transforming the whole island into a hellish nightmare.
May 1945. Foyle joins a municipal committee that's preparing for the now imminent V-E Day celebration but soon finds himself investigating the deaths of two of its members.
Wyatt has a fear that Marlowe could break up with him after they've gotten on each other's nerves for a while. Caitlin meets a cute boy named Calum at a party and later realizes he's a nerd so she writes him a fake phone number, but she writes the number on the back of her very own Khaki Card, on which she saved shopper's card points since she was 14 years old. So Caitlin needs to find a way to search for Calum and get her Khaki card back.
It's Earth Day in Bed Stuy and Chris decides to collect cans because he believes it will be easy and that he can get Julius to help. Meanwhile, Rochelle is called into Tonya's school for inappropriate behavior and realizes just where Tonya's attitude comes from.
Three teenagers from the Pai Zhug Kung Fu Academy are chosen to fight the forces of an opposing academy and all other forces of evil.
In retirement John Adams laments the perils of a long life; loss of loved ones and growing irrelevance. But out of tragedy John rekindles his broken friendship with Thomas Jefferson and lives to discuss John Quincy's ambitious presidential agenda with him.
Stacey returns to Essex to sort out the situation with Gavin, but things don't look good.
Sir Thomas More refuses to accept Henry's command that his people swear an oath of "allegiance and recognition of the King's supremacy" to both church and state. Anne is made aware of the King's womanizing ways, and arranges then gives her blessing to his next mistress. Also, Anne has a confrontation with Lady Mary, Henry's daughter.
Gabrielle struggles with the reality of having a blind husband. Lynette is surprised when Rick Coletti shows up at the Scavo pizzeria. Bree and Katherine join forces to plan the Founders Day Ball. As part of his recovery, Mike asks a few people for forgiveness, and Orson starts sleepwalking.
Bob finally tracks down Nina, but on a visit back to Roth's lab he makes a gruesome discovery that suggests the experiment on Nina is about to go terribly wrong; the team investigates unusual crow attacks that appear to be targeting military airports.