Mid-flight father-daughter moment turns to panic
On a plane, Crandall tells Leona he's proud to be her father, until the scene warps and she collapses.
S2E23 · Who's Your Daddy?
20 moments · 31 min of essential viewing.
Moments, in order
House meets his old friend Crandall and his 'daughter'
Cuddy brings House a case; an old friend greets him as G-man and claims a Katrina orphan as his daughter. House is unconvinced.
House's bike theory: induce the arrhythmia
Every test says her heart is fine; House compares it to his bike at the mechanic and wants to provoke the arrhythmia on purpose.
House plays Crandall to coach Cameron, then the real thing
House role-plays the gullible friend for Cameron, then gets Crandall to sign and pushes for a paternity test he refuses.
Zapping Leona's heart until she hallucinates
The team sends pulses through each heart pathway; one causes a crash, another triggers hallucinations, and they freeze the culprit.
House trashes Cuddy's sperm donor shortlist
Cuddy asks for a genetics opinion; House rules out a square dancer and a Mozart-loving healer as losers.
Leona sees her dead mother: hallucination or not?
Leona screams for her mama; House argues the hallucinations are a reaction to pain from an autoimmune disease, and proposes to prove it.
House hurts Leona in the scanner to test his theory
House stabs and bends the girl's fingers while accusing her of a hustle; she hallucinates, and the team turns on him.
Crandall offers his marrow but refuses the truth
Crandall demands to be tested as donor; House recalls how easily he was conned before, and Crandall explains why he won't do a paternity test.
House gives Cuddy her fertility shots
Cuddy enlists House for twice-daily injections; he plays it professional, then lectures her on choosing a mate for smart reasons.
Wilson presses House about Crandall as the black ooze appears
House explains the old friendship and won't say if he ran the paternity test, then Leona's radiation is halted by something strange.
The ooze explained: reverse peristalsis
House guessed the lab result before it arrived; the team works from the strange vomit to liver failure.
Wilson uncovers why House feels guilty about Crandall
Over a messy lunch, Wilson accuses House of jealousy and learns what really happened with Crandall's old girlfriend.
Grandfather's record cracks the case: hemochromatosis
House halts the liver biopsy to play Jesse Baker's studio tape, deducing an inherited iron disease from his mood and tin ear.
House parades a Mozart-loving intern in front of Cuddy
House introduces a nervous new 'intern', Patrick Linehan, who snorts and loves Mozart, and Cuddy wants him gone.
The treatment backfires and House questions science
Leona's lungs fill with holes after the iron treatment; House walks the team through where the iron went and lands on a fungus.
House tells Cuddy genes and trust matter
Cuddy scolds House for his donor stunt; during her shot he urges her to pick someone she trusts and likes.
Wilson walks in on House's leg rub and calls out the test
Wilson finds House with a massage, then corners him: he must have run the paternity test.
House makes intubated Leona confess where she lived
With the fungus unknown, House has Leona blink to admit her lies; she points to the flooded recording studio and zygomycosis.
House tells Leona the paternity result
Crandall explains why he wants to be a father; then House tells Leona the truth about the test, and they call it even.
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