A gay man with full-blown AIDS collapses in front of House's home and goes into shock. When House discovers the man's father is suffering from symptoms of his own, he must determine if they might be connected and save both their lives.Meanwhile, Cameron faces a potentially life-threatening disease of her own.

original airdate--November 22,2005      rating--14.72 million

songs--Theme song--"Teardrop" by Massive Attack

• "Crystalline Green" by Goldfrapp,--"Colors" by Amos Lee ft Norah Jones.