Working for a secret subdivision of S.H.I.E.L.D., Hulk is sent on his most dangerous mission yet! After the events of AGE OF ULTRON, history is breaking - and only the Hulk is strong enough to hold it together - but only with Bruce Banner's help! It's Hulk vs. the Chronarchists in the last hours before the extinction of the dinosaurs! Kid Colt, Two-Gun Kid, Rawhide Kid and the Black Knight guest star - but when the Chronarchists arrive in the time of Camelot, can the Hulk triumph against Merlin the magician? As Bruce Banner finds himself literally running out of time, the Hulk returns to the present - but which Hulk? Answers had better come fast, because the final showdown with the Chronarchists looms - and it's time to smash!.