"Rogue War, Chapter 5 of 6"
*Flash is confronted by two of his most dangerous enemies - Zoom and the Reverse Flash, pulled from the future - who have between them overpowered most of his other foes. Even with the help of the original Flash and the current Kid Flash, Wally West is whisked away onto the cosmic treadmill. One of the consequences of their trip through time is that Captain Boomerang is snatched away from a robbery in the past and deposited in the 30th century. The two villains then bring Flash to their destination - the moment when Zoom attacked Wally's wife Linda and caused her to miscarry. They plan to force Wally to watch this moment many times over, but help is at hand - Barry Allen, Wally's mentor, arrives on the scene via another cosmic treadmill. *Source: dcuguide.com