They realize the Guardian has been poisoned, and that the only cure is the milk from a female Hydra.
Academy Awards | United States Military Academy | Russian Academy of Sciences | National Academy of Sciences | American Academy of Arts and Sciences | Academy Award for Best Foreign Language Film | United States Naval Academy | United States Air Force Academy | Royal Academy of Music | Academy of Motion Picture Arts and Sciences | Brooklyn Academy of Music | Phillips Academy | Royal Military Academy Sandhurst | Phillips Exeter Academy | Chinese Academy of Sciences | British Academy of Film and Television Arts | National Academy of Engineering | Pennsylvania Academy of the Fine Arts | Loch Ness Monster | Academy of Fine Arts | British Academy | Academy Award for Best Picture | Bulgarian Academy of Sciences | Star Wars Episode III: Revenge of the Sith | Polish Academy of Sciences | Academy Award for Best Visual Effects | New York Academy of Sciences | Academy Award for Best Original Song | Jan Matejko Academy of Fine Arts | Frankenstein's monster |