PA: Viewer discretion is advised.

A YOUNG MAN FORCED TO TAKE ON THE ROLE OF FATHER TO HIS YOUNG SIBLINGS IS FACED WITH A CHOICE THAT COULD SAVE HIS LIFE OR BREAK UP HIS FAMILY, AND TRITTER PUTS SERIOUS PRESSURE ON WILSON TO ADMIT HE KNOWS THE TRUTH ABOUT HOUSE'S USE OF PAIN MEDICATION ON "HOUSE" TUESDAY, JUNE 19, ON FOX

Patrick Fugit ("Almost Famous") Guest-Stars

House's newest patient is 18-year-old Jack (guest star Patrick Fugit, "Almost Famous"), brought to the hospital after experiencing a heart attack and massive vomiting. Barely an adult himself, Jack has been the parent to his younger brother and sister since their parents died. After a brief perusal of Jack's file, House thinks he's got the diagnosis, seals it in an envelope and turns the process into a game, challenging Cameron, Foreman and Chase to figure it out on their own. When Jack is given an option that would lead to a possible reprieve from his worsening illness, he's faced with a decision that could break up his little family forever. Meanwhile, in an attempt to extract a confession, Tritter (guest star David Morse) makes it almost impossible for Wilson to practice medicine, driving a friendship-ruining wedge between House and Wilson in the "Whac-A-Mole" episode of HOUSE airing Tuesday, June 19 (9:00-10:00 PM ET/PT) on FOX. (HOU-308) (TV-PG L)

Cast: Hugh Laurie as Dr. Gregory House; Lisa Edelstein as Dr. Lisa Cuddy; Omar Epps as Dr. Eric Foreman; Robert Sean Leonard as Dr. James Wilson; Jennifer Morrison as Dr. Allison Cameron; Jesse Spencer as Dr. Robert Chase.

Guest Cast: Patrick Fugit as Jack Walters; David Morse as Michael Tritter; Cassi Thomson as Kama Walters; Tanner Blaze as Will Walters; Dustin Seavey as Rodent; Alan Rosenberg as Bruce Steinerman; Mandy June Turpin as Beth; Deborah Lacey as Lorraine; Marco Pelaez as Pharmacist; Dorothea Harahan as EMT; Cassius Willis as Officer; Patrick Birkett as Old Man; Bobbin Bergstrom as Nurse