Helen goes to see fiancé Davis, telling Joe their intimate evening together was "a mistake."
The arrival of Helen's "perfect"---and snobby---sister Casey spoils Joe's romantic-dinner plans.
Joe joins Brian in seeing a therapist after Helen moves up their wedding date.
Brian starts dating again, but finds no immediate spark with a woman who seems perfect for him.
Lowell invests in a defunct attraction that shows little sign of life.
Casey and Brian plan a surprise engagement party for Joe and Helen, but Helen thinks they're having an affair.
The businessman Antonio's chauffeuring makes a play for Casey.
Brian goes out with his ninth-grade teacher; a "Simon says" instructor plans on marrying Roy's mom.
Helen's mom arrives with a cash wedding gift, which is no surprise---save for the amount.
A famous astronaut comes to Nantucket to endorse Sandpiper Airlines.
An air-traffic controller holds Antonio at gunpoint for eating his doughnut.
Joe's secret admirer Sandy Cooper returns, claiming that her previous action was a joke.
Joe and Helen make friends with a new couple, but a weekend together changes things for one duo.
Roy prepares to marry a mail-order bride from Russia.
After Joe and Helen set their wedding date, they crash a reception to check out a facility.
A reunion brings back Brian's old flame, who has surprises for both Hacketts.
Brian answers a call meant for Joe, who's forced to tell him about Sara.
After Fay's retirement, Helen persuades Joe to hire Casey, who stuns the brothers by accepting---and doing a great job.
Brian is confronted by his ex, Alex, on a talk show.
A gallery owner sees art in Lowell's welded gift to Casey, who pictures herself as Lowell's agent. Meanwhile, Brian's little joke on Joe creates big problems for Helen.
Brian makes a video diary of Joe and Helen's relationship, as recalled (in flashbacks) by friends and family, including Roy.
Joe and Helen consider buying the house of Lewis Blanchard's dying uncle; stressed Helen dreams she is Marcia Brady.
Helen plans a quickie divorce from Antonio, whom she once wed to prevent his deportation.
Antonio falls for his cousin's fiancée, whom he's to entertain while his cousin is away.
Brian plans a wild bachelor party for Joe, while Helen anticipates a quiet evening. And each gets the night the other wanted.
Helen and Joe's wedding is marred by mishaps, including no tux for Joe and a magic-marker mustache for Helen.
