Sondelius contracts the disease. In his death throes, he pleads with Arrowsmith to abandon scientific protocol and save as many lives as possible. Concerned about his wife's welfare, Arrowsmith asks Marchand to check on her upon his return to the main island, only to have his colleague die while on the phone before he can give his report. Arrowsmith races home, but Leora is dead. In a drunken delirium, he gives the serum to all, saving the Indies from the plague. Upon his return to New York, he is hailed by the press and feted by McGurk Institute head Dr. Tubbs, who seeks to take advantage of Arrowsmith's glory. Arrowsmith instead rushes directly to Gottlieb.