Kirk and Spock must travel into the past in order to correct a change that will alter history.

The Enterprise visits a planet with an Earth-like 1920s gangster culture, with Runyonesque dialog and costumes.

A ventriloquist is convinced that his dummy, Willie, is alive and evil. He makes plans for a new act with a new dummy: plans that Willie doesn’t support!

A bored, wealthy businessman gets a chance to go back in time and start over, armed with all the knowledge he’s acquired…an arsenal that’s not as powerful as he thinks.