"Every day seems to bring some new super-powered villainy to Central City, and with a full-time police job and a high-maintenance gal pal both competing for his time, even a super-speedster like the Flash can start to feel overwhelmed. Luckily for Barry Allen, another era's Flash is ready to step out of retirement and join forces with him to face down the foes of two different earths! And with help from such allies as Kid Flash and the Elongated Man, even the best-laid plans of questionable characters like the Trickster and the Shade will come to grief"-- Cover verso.