Zoom, regrets the public knowledge of his identity. Barry appears from somewhere in time—stating that he is from a period shortly before his death—counseling his nephew, and talking the Spectre into granting his wish, erasing all public knowledge of Wally and Barry's identities as the Flash (Although Wally himself also loses his memory of his identity for a time). Barry then disappears, telling his nephew that he will come to his aid three times, on the three most difficult days of his life of which this is the first. In fact, when Zoom enlists the aid of the original Professor Zoom to make Wally relive the loss of his beloved twins, Barry is already there, trying to stop his "own" Reverse-Flash; Zoom apparently retrieved Eobard Thawne from the day that he attempted to kill Fiona Webb, with Barry following his nemesis. For the second time, he helps Wally to undo the damage dealt by Zoom, also allowing Wally to save his twins, and then he returns to his proper time, dragging his Zoom with him and breaking his enemy's neck in his timeline. Infinite Crisis In the fourth issue of Infinite Crisis, Barry Allen comes out from the Speed Force, along with Johnny Quick and Max Mercury, to help his grandson Bart deal with Superboy-Prime, taking the villainous teen with him in the Speed Force. Bart Allen appears wearing Barry Allen's costume in Tokyo near the end of Infinite Crisis #5 to tell the heroes that Superboy-Prime has escaped the Speed Force. Bart again reappears in Infinite Crisis #7 in Barry Allen's costume to combat Superboy-Prime once more. In Flash: The Fastest Man Alive #6 (2006) (with a portion taking place shortly before Infinite Crisis #5) it is told how Barry spent four years in an alternate Keystone City along with Max Mercury, Johnny Quick, and an alternate Jay Garrick, until he met Bart and Wally West, joining him after the battle against Superboy-Prime. After Superboy escapes, Barry suggests that someone has to absorb the whole Speed Force and cross the dimensional bridge back to Post-Crisis Earth. As Bart volunteers, Barry gives him his suit as a last gift, to keep the Force contained, and stays behind. Wally West did not go because of his wife and kids. Bart says he knows Barry would go if he could, but why Barry Allen could not make the journey himself is not