The Legion use Grodd's new time-travel device to loot the past and trap the Super Friends in 70 million BC (Black Manta and Giganta vs. Aquaman and Apache Chief), Arthurian England in 500 A.D. (Sinestro and Captain Cold vs. Green Lantern and Samurai), and Ancient Rome (Solomon Grundy and Gorilla Grodd vs. Batman and Robin). Aquaman buries his communicator in the past on the site of the Great Hall of Justice to activate it in the present and contact the Super Friends, and Superman breaks the time barrier to rescue them and then travels through time with a geiger counter to locate the other missing heroes. Then the Super Friends confront the Legion at Sutter's Mill in 1848 where they are planning a gold heist. The heroes easily defeat the villains who make a hasty escape with the pre-programmed time travel device.