Kid Flash [Wally West]; Mr. Mason; Miss Grant; Jimmy King; Beatnik Gang (villains)
Jimmy King, one of Wally's classmates, runs away after being accused of cheating. He meets up with his cousin, who is one of the members of the Beatnik Gang, and it's up to Kid Flash to rescue him and stop the Gang.
The Atom [Ray Palmer]; Alpheus V. Hyatt; Talbot Edwards; Colonel Tom Blood (villain)
When Professor Hyatt retrieves one of the British crown jewels, the Atom travels back to the year 1671 to return it and finds himself trying to save the entire collection from being stolen in that era.