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House episode
"Need to Know"
Need to know.jpg
Episode no. HOU-211
Airdate February 7, 2006
Writer(s) Pamela Davis
Director(s) David Semel
Guest star(s) Sela Ward as Stacy Warner
Currie Graham as Mark Warner
Julie Warner as Margo Dalton
Edward Kerr as Ted Dalton
Elle Fanning as Stella Dalton
Final diagnosis Ritalin use
Hepatocellular adenoma
Episode chronology
←  Previous Next  →
"Failure to Communicate" "Distractions"

"Need to Know" is the eleventh episode of the second season of House, which premiered on the FOX network on January 10, 2006.


A woman, Margo Dalton, is preparing for her daughter Stella’s birthday party when she feels a twinge on her arm. Going out to her car, her other arm begins to convulse as well. She begins to have a series of uncontrollable spasms and drives the car through the garage door.

House suspects Margo may be pregnant and give her a paralytic so they can run some tests. The tests reveal that Margo isn’t pregnant. Margo displays sudden irritability, which confirms Foreman’s suspicion of Huntington's disease. The team is interrupted by the news of Margo going berserk and destroying her room.

Wilson confronts Stacy over her kiss with House and warns she can’t toy with him. She admits she doesn’t know what she’s doing.

House suspects Margo is using drugs and sends Cameron and Foreman to check out her house. Cameron finds the daughter Stella’s Ritalin. House suspects they’re the cause of her symptoms. When Foreman chooses not to release her until it’s confirmed, House goes to visit the family. He interrogates Stella and determines she’s not taking her Ritalin. Margo reveals she never gave Stella the Ritalin and instead used it herself.

House then visits Stacy, who reveals she’s leaving now that Mark is getting better. House argues that she loves him more than Mark and he doesn’t want her to leave. Margo is discharged, but while leaving she has a stroke and collapses. Cameron calls House with the news. It is revealed that he is in bed with Stacy at his side.

The team begins to work on diagnosing Margo’s new symptoms. House suspects the fertility treatments caused endometrial cancer. On the roof, Stacy meets with House. He wants to know if she is going to tell Mark about their affair, but she stalls.

Margo's initial tests for cancer come back negative, but House persists and orders a biopsy to find the suspected tumor. During Margo's biopsy, she begins to bleed from her uterus. They determine the blood is coming from her liver, leading them to suspect a tumor there instead.

Mark comes to House asking for advice, concerned that he’s shutting Stacy out. House goes up a flight of stairs to avoid him, but Mark tries to follow him and collapses. House refuses to help him.

House is not convinced that the symptoms indicate a liver tumor and takes another look at her history. House suspects that Margo was secretly using birth control pills to negate the fertility treatments, believing that she didn’t want a child even though her husband did. The combination of Ritalin, birth control, and fertility treatments caused the tumor, which House believes should be benign. But Margo still claims she’s not taking the pills and insists on undergoing surgery despite the risks. The surgery reveals the benign tumor that House suspected. Margo asks Foreman to lie to her husband and claim she can’t take fertility treatments any more. Foreman refuses.

Cameron goes to House, who has her HIV test results, which are negative. House has already read it and gives it to her to read. House confronts Stacy, who reveals she’s going to leave Mark for House. House tells her it’s Mark who is willing to do what it takes, not him, and he can’t make her happy. He worries their relationship will disintegrate once again.

Wilson sees Stacy packing up and he confronts House. Wilson points out that House sent Stacy away so he could keep feeling miserable, and so he won’t have to change and lose what he thinks makes himself special. Wilson storms off as House considers what he said.

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