In the conclusion of the two-part Euphoria arc, Eric Foreman remains in isolation with no diagnosis and roughly thirty-six hours to live. House attempts increasingly reckless measures — flooding Foreman with simultaneous drug combinations, deliberately infecting him with Legionella without consent to slow the disease's progression, and racing back to the cop's apartment without protective gear to find the source. Cameron, holding Foreman's medical proxy, forces the brain biopsy House has been stalling. The answer turns out to be Naegleria fowleri, a brain-eating amoeba from a contaminated irrigation system, confirmed just as the biopsy is already underway. Foreman survives, but motor function tests reveal he cannot move his limbs despite believing he can — the biopsy that identified the cure may have caused permanent brain damage.

The episo ...