Release Message:  Captain Picard and crew follow Data back to the late 1800s to get him back, only to find the suspected alien visitors killing people of that time. Featuring Jerry Hardin as Mark Twain.

Description:  Captain Picard and crew follow Data back to the late 1800s to get him back, only to find the suspected alien visitors killing people of that time. Wikipedia: Data is time-warped back to San Francisco of the 19th century.