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As Sarah and Luc's nuptials approach, plans go horribly awry and the Walkers learn several surprising lessons about the real meaning of family.
After Sarah confronts Brody about his being her father, she decides she no longer wants him to be a part of her life or Nora's.
Parenthood is questionable for more than one member of the Walker family, as Justin keeps a closely guarded secret about the true paternal identity of one of his siblings.
Nora finally gives in to her feelings for Brody, which leads to a spontaneous romantic getaway. Meanwhile Sarah and Luc closely consider growing their family.
In the second part of this two-part episode, emotions are running high in the Walker family when Nora and Saul find out their mother, Ida, has passed away.
When Olivia's brother shows up and sets out to gain custody of her from Kevin and Scotty, the Walkers struggle amongst themselves to determine what's best for Olivia.
Nora and Sarah fly to D.C. to "surprise" Evan for his birthday, but what they're really after is the truth behind Kitty's extended trip to the east coast.
Though Nora tries her best to keep Brody at bay, she can't help but feel the long lost connection between them, and Justin reaches out to a homeless vet.
The Walkers' Valentine's Day plans go horribly awry when Tommy tells Sarah about another secret that Nora has kept buried since they were kids.
The Walkers are excited when Tommy comes down for a visit, but his new girlfriend's enthusiasm for Walker family history rubs the family the wrong way.