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The Abbots are shocked when Dr. Linda Abbot, Harold's sister, returns to town after practicing medicine around the world. In all the excitement, Edna doesn't see that her relationship with Irv is suffering while Harold's excitement is cut short when Linda tells him that she wants to join his practice. Meanwhile, Andy talks to the parents of pre-teens who have been practicing unsafe sex and is shocked by their reaction to the situation; and Bright asks Ephram to look out for Amy.
This is the first appearance of Marcia Cross (Linda Abbott).
Vivien Cardone (Delia Brown) and Sarah Lancaster (Madison) do not appear in this episode.
Linda: I have something for you too, Harry.
Harold: You shouldn't have.
Linda: It's an instrument. They use it to call the flock home.
Harold: Yes, well that will be very useful when I've ... lost all my sheep.
Laynie: You in?
Ephram: I try not to drink before 5th period.
Bright: Mind if I sit here?
Ephram: Only if you stay.