Expanding the DC K.O. blockbuster saga through the lens of the Speed Force, the Flash Family becomes the linchpin connecting timelines as battles rage across worlds--revealing how the fight for the Heart of Apokolips reshapes the flow of time itself. Legendary Flash writer Mark Waid returns to the character he co-created--Impulse--as the impetuous speedster decides he can stop the havoc of DC K.O. single-handed! But the young hero's Impulsepoint will do much more harm than good, and now the Flash must stop Impulse's race through time before he wipes out everything! Plus Darkseid's Absolute Legion chases the speedsters to Flash Barry Allen's origin moment, and Flash Jay Garrick battles Green Lantern Guy Gardner in a K.O. bout for the ages in this collection of THE FLASH #26-30!